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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 14 Page 116

Round each number and multiply.

About 40

Practice makes perfect

We want to estimate 54 % of 76.8. Let's start by rounding each number. rcl 54 % & ≈ & 50 % [0.3em] 76.8 & ≈ & 80 Now we multiply 50 % by 80 to get an estimation. First, we write the percent as a fraction.

50 %* 80

▼

Write the percent as a fraction

Write as a fraction

50/100 * 80

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

50÷ 50/100÷ 50 * 80

Calculate quotient

1/2 * 80

MoveRightFacToNumOne

1/b* a = a/b

80/2

Calculate quotient

40

We found that 54 % of 76.8 is about 40.

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