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Percentages SAT question
Math · Problem-Solving and Data Analysis · Easy · Answer it here, explanation included.
A table of the US minimum wage for 6 different years is shown below.
| Year | US minimum wage (dollars per hour) |
|---|---|
| 1960 | 1.00 |
| 1970 | 1.60 |
| 1980 | 3.10 |
| 1990 | 3.80 |
| 2000 | 5.15 |
| 2010 | 7.25 |
What was the percent increase of the minimum wage from 1960 to 1970?
ExplanationShow
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 
.
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.
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