Explanation

The percent increase from 2000 to 2001 is:

Percent Change =\(\frac{Difference}{Original}\times 100 \%\)
Percent Change =\(\frac{20}{10}\times 100 \%=33.333333 \%\)

Now, apply a 33.33333%, or \(\frac{1}{3}\), increase to 2004’s figure. The GRE calculator cannot accept a repeating decimal; instead, divide 162 by 3 to get the amount of increase, and then add 162 to get the new profit per student in 2005: 162 ÷ 3 + 162 = 216.
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Sandy
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