solve a proportion
Percent proportion
Using P/B = r /100
Percent of Change
Finding total cost of bill
100

1/7 = a/14

What is 2

100

40 is what percent of 80%

What is 50%

100

18 is 12% of what number

18/x = 12/100

What is 150

100

Find percent of increase or decrease. Round to nearest percent.

Original: 20

New: 12 

What is 40% decrease

100

The cost of dinner is $84. What will your total bill be if you leave a 15% tip?

what is $96.60

200

9/6 = 15/b

What is 10

200

Find 10% of 170

What is 17

200

32 is 400% of what number

32/x = 400/100

What is 8

200

What is the percent of increase and decrease. Round to the nearest percent.

Original: 34

New: 51

What is 50 % increase

200

You buy a cell phone for $455...If you pay 8.2% tax, what is your total cost?

What is $492.41

300

4/2 = (x +2)/3

What is 4

300

What number is 150% of 12

18

300

Find 84% of 500


P/500  = 84/100

What is 420

300

Find the percent of increase or decrease

Original: 15

New: 24

What is 60% increase

300

What will you pay for a big umbrella that's normally $44 but is on sale for 25% off?

What is $33

400

(c + 5)/15 = 8/6

What is 15

400

30 is what percent of 150?

What is 20%

400

What number is 15 % of 42

x/42 = 15/100

What is 6.3

400

Find the percent of increase or decrease.

Original: 50

new: 26

What is 48% decrease

400

You buy speakers  for $53. If they are 20% off and you are charged 6.5% tax, what is the total cost of the speakers (Round anwer to the nearest cent)?

What is $45.16

500

y / (y + 3) = 2/5

What is 2

500

600 is what percent of 240?

What is 250%

500

8 is what percent of 25?

8/25 = x/100

What is 32%

500

You are eating at your favorite restaurant for your birthday. The total bill for your group is $69.95. How much money would you add on for a 20% tip?


What is $13.99

500

You decide to try a new mobile company. The company is offering a promotion. The normal monthly payment is $60 for the first 6 months, but for the first 6 months, you save 15% off of the bill for each of those months. How much do you pay for your mobile service over the first year?

What is $666