Percent- proportions, equations, change

Distributive Property

100

-4(-8x - 8)

32x + 32

200

1/4(-16x + 8)

-4x +2

300

1/3(12- 9y)

4 - 3y

400

4(3.2d - 10)

12.8d - 40

500

1.5(6x + 2)

9x + 3

600

2.5(10x + 8)+ 3x

28x + 20

CLT

100

n + 4 - 9 - 5n

-4n - 5

200

n - 10 +19n - 3

10n - 13

300

-5n + 3(6 + 7n)

16n + 18

400

10 - 5n(9n - 9)

55 - 45n

500

5(-2n + 4) + 2(n+3)

-8n + 26

600

-9(6m - 3) + 6(1 + 4m)

-30m + 33

Percent proportions

100

What word is a clue for the whole in a percent proportion?

of

200

What is the formula to solve percent proportions?

part/whole = #%/100

300

What is 60 percent of 30?

18

400

25 is what percent of 90? Round to the nearest tenth.

27.8%

500

Maria has a collection of 190 marbles.  She gives away 30% of her marbles to her friend.  How many marbles did Maria give away?

57

600

A shipping box should weigh 1.0 pound (lb.) If there is a 10% error on the weight, what is the range of acceptable weight?

0.9- 1.10 lbs.

Percent Equation

100

Write the percent equation.

part = whole (%- in decimal form)

200

What is 14% of 250? Write equation and answer.

35

x=.14(250)

300

5 is what % of 125? Write equation and answer

4%

5=x(125)

400

30% of what number is 15? Write equation and answer.

.15(40)=x

6

500

7 is 12% of what number?

58.3 (repeating)

7= .12x

600

What is 135% of 50

x=50(1.35)

67.5

Percent Change

100

from 75 to 45     

40% decrease

200

Original price of book $49.95

3% tax

$51.45

300

Concert tickets $100

Discount 21%

$79

400

Cost of sled: $99.50 Markup: 95%

$194.03

500

Price of gas dropped from $3.50 to $2.87. By what percentage was the gas price reduced?

-18%

600

In 2020, summer camp registration was $15 more than it was in 2021. In 2020 registration was $285. By what % did the summer camp decrease in 2021?

-5%