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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 15 Page 116

Round each number and multiply.

About 24

Practice makes perfect

We want to estimate 10.5 % of 238. Let's start by rounding each number. rcl 10.5 % & ≈ & 10 % [0.3em] 238 & ≈ & 240 Now we multiply 10 % by 240 to get an estimation. First, we write the percent as a fraction.

10 %* 240

▼

Write the percent as a fraction

Write as a fraction

10/100 * 240

a/b=.a /10./.b /10.

10÷ 10/100÷ 10 * 240

Calculate quotient

1/10 * 240

MoveRightFacToNumOne

1/b* a = a/b

240/10

Calculate quotient

24

We found that 10.5 % of 238 is about 24.

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