Percent Proportions
Proportional vs Nonproportional
Solving Proportions
Discount, Markup, Tax and Tip
Percent of Change
100
Use the percent proportion to solve each problem.
18 is what percent of 40?
45%
100
Determine whether the quantities in each table represent a proportional relationship. If yes, give the constant rate.
Yes, $9/hour
100
Determine whether the pair of ratios forms a proportion.
5/6 , 20/24
yes, proportional
100
Find the discount and markup for each, then find the final selling price. Round to the nearest cent when necessary.
Tablet: $492, 20% off
$393.60
100
Find the percent of change and classify as a percent increase or decrease. Round to the nearest tenth of a percent when necessary.
The Smith’s home was worth $402,500 in 2023
and $511,000 in 2026.
26.9% Increase
200
Use the percent proportion to solve each problem.
Find 8.5% of 160
13.6
200
Determine whether the quantities in each table represent a proportional relationship. If yes, give the constant rate.
Yes, 21 Miles Per Gallon
200
Determine whether the pair of ratios forms a proportion.
0.5/18 , 1.5/40
Nonproportional
200
Find the discount and markup for each, then find the final selling price. Round to the nearest cent when necessary.
cell phone: $995.79, 25% markup
$1244.74
200
Find the percent of change and classify as a percent increase or decrease. Round to the nearest tenth of a percent when necessary.
Brandon bought a pair of sneakers for $55 that had a regular price of $90.
38.8% decrease
300
28 is 4% of what number?
700
300
Determine whether the quantities in each table represent a proportional relationship. If yes, give the constant rate.
Nonproportional
300
Solve each proportion.
16/12=x/3
x=4
300
Find the final price of a $849.99 laptop with 6% sales tax.
$900.99
300
Find the percent of change and classify as a percent increase or decrease. Round to the nearest tenth of a percent when necessary.
The average high temperature was 86° in August then 74° in September.
14% Decrease
400
A book collector has 425 books, 56% of which were published proior to 1900. How many books were published prior to 1900?
238 Books
400
Ben earns $8.50 per hour bagging groceries at the grocery story.
400
Solve each proportion.
(4x)/5=84/15
x=7
400
A $405 watch is selling for 30% off. Find the final price of the watch if the
sales tax is 8%.
$306.18
400
Find the percent of change and classify as a percent increase or decrease. Round to the nearest tenth of a percent when necessary.
This year’s school enrollment at Brookhaven Middle School is 1,524 students. Last year, the enrollment was 1,398 students.
9% Increase
500
On the high school football team, 62.5% of the players are juniors and seniors. If there are 11 juniors and 19 seniors, find the total number of players.
48 Players
500
Mitch pays $0.30 per minute on a long distance phone call.
500
Solve each proportion.
2/3=(x-2)/12
x=10
500
Greg and Chandra went out to dinner. Their dinner bill came to $264.56. If they had a $50 coupon and left a 20% tip, how much did they pay in total?
$257.47
500
Find the percent of change and classify as a percent increase or decrease. Round to the nearest tenth of a percent when necessary.
Marshall’s dog weighs 82 pounds. The vet said 75 pounds would be more ideal for his size. What percent of his weight does he need to lose?
8.5 Decrease