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Big Ideas Math Geometry, 2014 View details

Maintaining Mathematical Proficiency

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Exercise 1 Page 665

The percent proportion is a proportion that equates a part of a whole to a percent out of 100.

20 %

Practice makes perfect

The percent proportion is a proportion that equates a part of a whole to a percent out of 100. part/whole=percent/100 ⇔ a/w=p/100 We can find what percent 6 of 30 is by thinking about 6 as a part and 30 as the whole. Let's substitute a= 6 and w= 30 into the formula and solve for p.

a/w=p/100

SubstituteII

a= 6, w= 30

6/30=p/100

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Solve for p

ReduceFrac

a/b=.a /6./.b /6.

1/5=p/100

MultEqn

LHS * 100=RHS* 100

1/5* 100=p/100 * 100