Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
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Exercise 19 Page 415

Is the value of the new amount greater than or less than the value of the original amount?

25 % decrease

Practice makes perfect

To determine percent change p, we can use the following general formula. p % =Amount of increase or decrease/Original amountFrom the given values, we can see the original amount was $20 and the new amount is $15. This is a decrease in the amount. 20-15= 5 The difference between the new amount and the original amount is $5. Now we can use the formula.

Percent change=Amount of increase/Original amount
Percent change=5/20
Percent change=1/4
Percent change=0.25
Percent change = 25 %

The percent decrease is 25 %.