Question a-tabl

3.2 Percentages - Percent increase/decrease
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A table of the US minimum wage for 6 different years is shown below.

YearUS minimum wage
  (dollars per hour)
19601.00
19701.60
19803.10
19903.80
20005.15
20107.25
 

What was the percent increase of the minimum wage from 1960 to 1970?

A.

30%

B.

60%

C.

62.5%

D.

120%

A table of the US minimum wage for 6 different years is shown below. Year US

Medium-difficulty · SAT Math · Percentages — Percent increase/decrease. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.

Answer explanation

Choice B is correct. According to the table, the minimum wage in 1960 was $1.00 per hour, and in 1970 it was $1.60 per hour. The percentage change is therefore 100 times open parenthesis, the fraction with numerator 1 point 6 0 minus 1 point 0 0, and denominator 1 point 0 0, close parenthesis, equals 60 percent.

Choice A is incorrect and may result from averaging the two wages before calculating the percentage change. Choice C is incorrect. This is the 1960 wage expressed as a percentage of the 1970 wage, not the percentage change between the two. Choice D is incorrect and may result from a calculation error.