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Glencoe Math: Course 2, Volume 1

GM

Glencoe Math: Course 2, Volume 1 View details

2. Percent and Estimation

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Exercise 1 Page 115

Start by rounding the percent. Then multiply the rounded percent by 70.

About 35

Practice makes perfect

We want to estimate 47 % of 70. Let's start by rounding the percent. rcl 47 % & ≈ & 50 % Now we multiply 50 % by 70 to get an estimation. First, we write the percent as a fraction.

50 %* 70

▼

Write the percent as a fraction

Write as a fraction

50/100 * 70

a/b=.a /50./.b /50.

50÷ 50/100÷ 50 * 70

Calculate quotient

1/2 * 70

MoveRightFacToNumOne

1/b* a = a/b

70/2

Calculate quotient

35

We found that 47 % of 70 is about 35.

Subchapter links

Guided Practice p.114

Independent Practice p.115-116

H.O.T. Problems p.116

Standardized Test Practice p.116-118

Extra Practice p.117

Common Core Review p.118