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12.Practice.Tests.for.the.SAT_2015-2016_1128p

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42 KAPLAN'S GUIDE TO THE <strong>SAT</strong> CHANGE AND PRACTICE QUESTIONS<br />

358.5 = 1 .02(200) + 1 .03(p - 200)<br />

358.5 = 204+1.03p - 206<br />

358.5 =-2+1.03p<br />

360.5 =1.03p<br />

350=p<br />

To calculate <strong>the</strong> exchange rate on Wednesday:<br />

r reais . 763<br />

350 dollars x -- =763 rea1s r= - =2.18<br />

1 dollar 350<br />

To find <strong>the</strong> amount of decrease, as a percentage,<br />

in <strong>the</strong> exchange rates from Monday to Wednesday:<br />

2·18-2·25 =<br />

-0.07 ::: -0.031 , which represents a<br />

2.25 2.25<br />

decrease of about 3%.

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