DashboardNewsSettingsHelp
Get Premium
Dashboard
Dashboard Sign out
Big Ideas Math: Modeling Real Life, Grade 7
BI
Big Ideas Math: Modeling Real Life, Grade 7 View details
3. The Percent Equation
Continue to next subchapter
search

Exercise 8 Page 249

The percent equation is an equation in which the part is equal to the product of the corresponding percent and the whole.

20 %

Practice makes perfect

The percent equation is an equation in which the part is equal to the product of the corresponding percent and the whole. We can represent a is p percent of wwith the following equation. a= p% * wWe can find what percent of 70 is equal to 14 by substituting a= 14 and w= 70 into the formula and solve for p% using the Properties of Equality.

a= p% * w
SubstituteII

a= 14, w= 70

14= p% * 70
â–¼
Solve for p%
DivEqn

.LHS /70.=.RHS /70.

14/70=p% * 70/70
CancelCommonFac

Cancel out common factors

14/70=p% * 70/70
SimpQuot

Simplify quotient

14/70=p%
CalcQuot

Calculate quotient

0.2=p%
RearrangeEqn

Rearrange equation

p%= 0.2

Since 0.2 equals 20%, we can complete percent equation. 14= 20% * 70 We found that 14 is 20 % of 70.

Checking Our Answer

 Checking Our Answer
We can use a model to check our answer.

Subchapter links expand_more
arrow_right Try It p.248-249
1
Try It 2 (Page 248)
Try It 3 (Page 249)
Try It 4 (Page 249)
Try It 5 (Page 249)
Try It 6 (Page 249)
arrow_right Self-Assessment for Concept & Skills p.249
7
Self-Assessment for Concept & Skills 8 (Page 249)
Self-Assessment for Concept & Skills 9 (Page 249)
Self-Assessment for Concept & Skills 10 (Page 249)
Self-Assessment for Concept & Skills 11 (Page 249)
12
arrow_right Self-Assessment for Problem Solving p.250
13
14
arrow_right Review & Refresh p.251
Review & Refresh 1 (Page 251)
Review & Refresh 2 (Page 251)
Review & Refresh 3 (Page 251)
Review & Refresh 4 (Page 251)
5
Review & Refresh 6 (Page 251)
Review & Refresh 7 (Page 251)
Review & Refresh 8 (Page 251)
9
arrow_right Concept, Skills, & Problem Solving p.251-252
10
11
12
Concept, Skills, & Problem Solving 13 (Page 251)
Concept, Skills, & Problem Solving 14 (Page 251)
Concept, Skills, & Problem Solving 15 (Page 251)
Concept, Skills, & Problem Solving 16 (Page 251)
Concept, Skills, & Problem Solving 17 (Page 251)
Concept, Skills, & Problem Solving 18 (Page 251)
Concept, Skills, & Problem Solving 19 (Page 251)
Concept, Skills, & Problem Solving 20 (Page 251)
21
22
Concept, Skills, & Problem Solving 23 (Page 252)
Concept, Skills, & Problem Solving 24 (Page 252)
Concept, Skills, & Problem Solving 25 (Page 252)
Concept, Skills, & Problem Solving 26 (Page 252)
Concept, Skills, & Problem Solving 27 (Page 252)
Concept, Skills, & Problem Solving 28 (Page 252)
29
30
31
32
33