Lesson 12 & 13 Quiz Study Guide

A schools enrollment last year was 3,421. This year the enrollment is 2,653. Which expression could be used to find the percent change?

• $\left(2,653+3,421\right)\div3,421$
  

• $\left(2,653-3,421\right)\times2,653$

• $\left(2,653+3,421\right)\div2,653$

• $\left(2,653-3,421\right)\div3,421$

Determine the percent change of the following numbers: You had $25 in your bank account last week. You now have $54 in your account.

• 116% increase

• 1.16% decrease

• 53% increase

• 5.3% decrease

Determine the percent change for the following numbers: Your mom baked 63 cookies, but your brother and his friends ate some of the cookies. Now there are 28 cookies left.

• 22% increase

• 1.20% increase

• 49% decrease

• 55% decrease

Find the percent change rounding to the nearest percent: From 130 To 165

• 27%

• 19%

• 78%

• 65%

Kim is buying a pair of shoes that are 35% off. If the original price is $62, how much does Kim pay?

• $32.90

• $16.29

• $40.30

• $86.00

Write this decimal as a percent: 0.025

• 250%

• 2.5%

• 20%

• 0.05%

Jack wants to buy his family a gingerbread house for $14. Since it's almost Christmas time, all of the gingerbread houses are marked up 30%. How much will Jack pay for the gingerbread house after the mark up?

• $12.83

• $4.32

• $18.20

• $20.75

60% of 25 is

• 15

• 23

• 76

• 4

Sam buys a bag of potatoes for $6. The sales tax is 7%. What is the total price Sam pays for the bag of potatoes?

• $7.29

• $1.20

• $8.30

• $6.42

What is the formula use to solve for percent change?

• $\frac{\left(New+Old\right)}{New}$

• $\frac{\left(New\ -\ Old\right)}{Old}$

• $\frac{\left(Old+New\right)}{New}$

• $\frac{\left(Old-New\right)}{New}$