Ratio, Proportion and Percentages Puzzle – Challenge 28

Ratio, Proportion and Percentages Puzzle - Challenge 28 is a multiple-choice math challenge from Effortless Math. Read the problem, choose from the answer options below, then open the solution to see the full step-by-step working and check your reasoning against it.

This is a great math and critical thinking challenge to strengthen a child’s grasp of math concepts in a fun way.

Ratio, Proportion and Percentages Puzzle – Challenge 28

Challenge:

During the last three years, the price of a car has been reduced by (10%) in the first year, (20%) in the second year, and (25%) in the third year. What percent of the original price is the total reduction of the car’s price?

A- (36%)

B- (40%)

C- (46%)

D- (54%)

E- (55%)

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The correct answer is C.

Original price was: $27.99.Current price is: $17.99.
Satisfied 92 Students

Choose x for current price of the car. In the first year, the price of the car reduced to (0.90 x). Next year, it’ll be
(0.90x × 0.80 = 0.72x).
For the third year, the price of the car is: (0.72x × 0.75 = 0.54 x)
Therefore, (46%) of the original price is the total reduction of the car’s price.

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