Percent x Original = Part

Percent & Proportions

100

What is 35% of 76?

Percent * Original = Part

0.35 (76) = 26.6

26.6

or can use (is/of = percent/100)

200

68% of what number is 27.2

Percent * Original = Part

0.68 n = 27.2

40

300

30 is what percent of 55?

Percent * Original = Part

n (55) = 30

54.54%

400

What percent is 40 out of 90?

Percent * Original = Part

n (90) = 40

44.4%

500

Find 59% of 72.

Percent * Original = Part

0.52 (72) = 42.48

Discounts

100

A new calculator costs $20.  There is a 15% discount.

How much is the discount?

Percent * Original = Part

0.15(20) = 3

$3

200

A new computer costs $825.  This week it is on sale for 20% off.  

What is the discount?

Percent * Original = Part

0.2 (825) =165

$165

300

A new pair of jeans costs $52.  They are on sale for 30% off.  What is the discount?

Percent * Original = Part

0.3 (52) = 15.6

$15.60

400

A new pair of jeans costs $52. They are on sale for 30% off. How much will the jeans cost after the discount?

Percent * Original = Part

0.3 (52) = 15.6 

$15.60

$52 - 15.60= $36.4

500

A new computer costs $825. This week it is on sale for 20% off.

What does the computer cost with the discount?

Percent * Original = Part

0.2 (825) =165

825 - 165 = 660

$660

Tax

100

Sales tax in California is 9%.  What is the tax on a baseball bat that costs $45?

Percent * Original = Part

0.09 (45) = 4.05

200

The sales tax in Oregon is 5%.  What is the tax on a lawnmower that costs $423?

Percent * Original = Part

0.05 (423) = 21.15

$21.15

300

Sales tax in California is 9%. What is the total price for a baseball bat that costs $45?

Tax:  0.09 (45) = 4.05

Total Price:  45 + 4.05 = 49.05

$49.05

400

The sales tax in Oregon is 5%. What is the total price for lawnmower that costs $423?

Tax:  0.05 (423) =21.15

Total:  423 + 21.15 = 444.15

$444.15

500

Stephen bought a new car in California, which has a 9% sales tax.  He paid $720 in tax!  How much did the car cost?

Percent* Original = Part

0.09 n = 720

n = $8,000

Tips

100

Mr. Smith likes to leave a 20% tip for the waiter.  His food bill was $125.  How much money did he leave for the waiter?

Percent * Original = Part

0.2 (125) = 25

$25 tip.

200

Ms. Jones leaves a 15% tip when she eats out.  Her food bill totaled $63.40.  How much tip did she leave the waitress?

Percent * Original = Part

0.15 (63.40) = 9.51

$9.51

300

Mr. Gonzalez leaves an 18% tip when he eats out.  Last week he left $12.96 for a tip.  How much was the food bill?

Percent * Original = Part

0.18 n = 12.96

n = $72

400

Ms. Orlando had a food bill that totaled $90.  She left $15 tip.  What percent tip did she leave?

Percent * Original = Part

n (90) = 15

90n = 15

n=0.167  = 16.7%

500

Mr. Soltero likes to leave a 20% tip.  He took his wife out to dinner and the food bill was $350!  How much did he pay altogether.

Tip:  0.20 ( 350) = 70

Total:  350 + 70 = 420

$420

That was a very good dinner!

Wild Card

100

Write as a fraction (reduced to lowest terms):

65%

65/100

13/20

200

12 out of 30 students took ASL.  What percent studied ASL?

40%

Percent*Original=Part ((x/100)*30=12) x/100=12/30---x=0.4(100)---x=40%) OR

(is/of)=(percent/100)

(12/30)=(x/100); 1,200=30x; x=40

300

The tuition at a college increased from $50,000 in 2020 to $59,000 in 2021.  What is the percent increase in tuition? 

18%

((New value - Old value)/Old value)*100

((59,000-50,000)/50,000)*100=18

400

Wayne works at a nearby electronic store.  He makes a commission of 15% on everything he sells.  If he sells a laptop for $293, how much money does Wayne make on commissions?

$43.95.

Commission*price=total

0.15(293)=$43.95

500

Stacy bought a new belt.  It was originally $35, but is on sale for 40% off.  After the discount, she pays 10% tax.  How much did she pay altogether for the belt?

Discount:  0.4 (35) = $14

New Price: 35-14 = $21.

Tax: 0.1 (21) = 2.1

Total: $21 + 2.10 = $23.10