Understanding Occupations, Education, and Income

One of the most important financial math topics on the GED is understanding how education and occupation connect to income. You may be asked to read a salary table, calculate percent increases, or compare lifetime earnings. This lesson walks through the key concepts and the math skills you need to answer these questions confidently.

What Is the Relationship Between Education and Income?

In general, higher levels of education lead to higher average annual earnings. Studies consistently show that workers with more credentials tend to earn more over their careers, experience lower unemployment rates, and have access to a wider range of job opportunities. On the GED test, you may be given a data table or graph comparing education levels to median salaries and asked to calculate differences, percentages, or projections.

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How to Analyze Occupation and Income Data

1. Read the table carefully

Identify what each row represents (education level or occupation) and what the column(s) represent (annual salary, hourly wage, unemployment rate). Always note the units.

2. Calculate dollar differences

Subtract one salary from another to find the increase in annual earnings.

• High school diploma: ~$40,\(\color{blue}{\frac{000}{\text{ year }}}\)
• Associate’s degree: ~$50,\(\color{blue}{\frac{000}{\text{ year }}}\) → increase of $50,000 − $40,000 = $10,\(\color{blue}{\frac{000}{\text{ year }}}\)
• Bachelor’s degree: ~$65,\(\color{blue}{\frac{000}{\text{ year }}}\) → increase of $65,000 − $40,000 = $25,\(\color{blue}{\frac{000}{\text{ year }}}\)
• Master’s degree: ~$80,\(\color{blue}{\frac{000}{\text{ year }}}\) → increase of $80,000 − $40,000 = $40,\(\color{blue}{\frac{000}{\text{ year }}}\)

3. Calculate percent increase

Percent \(\color{blue}{\text{ Increase } = (\text{ New } – \text{ Old }) \div \text{ Old } \times 100}\)

• HS → Associate’s: \(\color{blue}{($10,000 \div $40,000) \times 100}\) = 25% increase
• HS → Bachelor’s: \(\color{blue}{($25,000 \div $40,000) \times 100}\) = 62.5% increase
• HS → Master’s: \(\color{blue}{($40,000 \div $40,000) \times 100}\) = 100% increase

4. Convert annual salary to hourly wage

Hourly \(\color{blue}{\text{ Wage } = \text{ Annual }}\) \(\color{blue}{\text{ Salary } \div (52 \text{ weeks } \times 40 \text{ hours })}\)

• $52,\(\color{blue}{000 \div (52 \times 40)}\) = $52,\(\color{blue}{000 \div 2}\),080 = $25.00 per hour

Step-by-Step Summary

1. Read the salary or earnings table carefully.
2. Calculate the dollar difference between two education levels or occupations.
3. Use the percent increase formula to find the relative change.
4. To find hourly rate from annual salary, divide by 2,080 (standard work year).
5. To find lifetime earnings, multiply annual salary by the number of working years.

Watch: Education as an Investment (Khan Academy)

This Khan Academy video explains the financial case for continuing education — and how to evaluate the return on that investment:

Worked Examples

Example 1: Rosa earns $52,000 per year as a dental hygienist. She works 40 hours per week for 52 weeks. What is her hourly rate?

Total \(\color{blue}{\text{ hours } = 40 \times 52 = 2}\),080. Hourly rate = $52,\(\color{blue}{000 \div 2}\),080 = $25.00 per hour.

Example 2: A table shows high school graduates earn an average of $40,\(\color{blue}{\frac{000}{\text{ year }}}\) and bachelor’s degree holders earn $65,\(\color{blue}{\frac{000}{\text{ year }}}\). What is the percent increase?

Increase = $65,000 − $40,000 = $25,000. Percent increase = $25,000 ÷ $40,\(\color{blue}{000 \times 100}\) = 62.5%.

Example 3: If a worker earns $40,000 per year for 40 years versus $65,000 per year for 40 years, what is the difference in lifetime earnings?

HS diploma lifetime earnings: $40,\(\color{blue}{000 \times 40}\) = $1,600,000. Bachelor’s lifetime earnings: $65,\(\color{blue}{000 \times 40}\) = $2,600,000. Difference = $2,600,000 − $1,600,000 = $1,000,000.

Example 4: A job listing says the salary is $18.50 per hour, 40 hours per week. What is the approximate annual salary?

Annual salary = $\(\color{blue}{18.50 \times 40 \times 52}\) = $\(\color{blue}{18.50 \times 2}\),080 = $38,480.

More Practice: What Happens If You Lose Your Income? (Khan Academy)

This Khan Academy lesson covers employment and income risks — important context for understanding the value of stable, well-paying careers:

Exercises

1. A worker earns $31,200 per year. What is the hourly wage, assuming 40 hrs/week, 52 weeks?
2. Education Level A averages $42,\(\color{blue}{\frac{000}{\text{ year }}}\) and Level B averages $58,\(\color{blue}{\frac{000}{\text{ year }}}\). What is the percent increase from A to B?
3. Carlos earns $17.25 per hour and works 35 hours per week for 50 weeks. What is his annual income?
4. A lifetime earnings comparison shows $1,200,000 vs. $2,000,000 over 40 years. What is the annual salary for each? What is the annual difference?
5. If a person’s income increases from $36,000 to $45,000, what is the percent increase?
6. Two job offers: Job A pays $\(\color{blue}{\frac{22}{\text{ hr }}}\) for 40 hrs/week; Job B pays $48,\(\color{blue}{\frac{000}{\text{ year }}}\). Which pays more annually?

Answers

1. $31,\(\color{blue}{200 \div 2}\),080 = $\(\color{blue}{\frac{15.00}{\text{ hr }}}\)
2. ($58,000 − $42,000) ÷ $42,\(\color{blue}{000 \times 100}\) ≈ 38.1%
3. $\(\color{blue}{17.25 \times 35 \times 50}\) = $30,187.50
4. $1,200,\(\color{blue}{000 \div 40}\) = $30,\(\color{blue}{\frac{000}{\text{ yr }}}\); $2,000,\(\color{blue}{000 \div 40}\) = $50,\(\color{blue}{\frac{000}{\text{ yr }}}\); difference = $20,\(\color{blue}{\frac{000}{\text{ yr }}}\)
5. ($45,000 − $36,000) ÷ $36,\(\color{blue}{000 \times 100}\) = 25%
6. Job A: $\(\color{blue}{22 \times 40 \times 52}\) = $45,\(\color{blue}{\frac{760}{\text{ yr }}}\). Job A pays more annually.

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Frequently Asked Questions

How do I convert an annual salary to an hourly wage?

Divide the annual salary by the total hours worked per year. For a standard full-time worker (40 hours/week, 52 weeks/year), divide by 2,080. Formula: Hourly \(\color{blue}{\text{ Wage } = \text{ Annual }}\) \(\color{blue}{\text{ Salary } \div 2}\),080.

How do I calculate percent increase in salary?

Use: Percent \(\color{blue}{\text{ Increase } = (\text{ New Salary } – \text{ Old Salary }) \div \text{ Old }}\) \(\color{blue}{\text{ Salary } \times 100}\). Always divide by the original (lower) salary, not the new one.

What does “median income” mean?

The median income is the middle value when all incomes in a group are sorted from lowest to highest. Half of workers earn more than the median and half earn less. The GED often uses median income data because it is less skewed by a few very high earners than the average (mean) income is.

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