Percent Increase & Decrease
What is the total cost, including tip, of a meal that costs $13 and you pay a 20% tip.
$15.60
Your total bill at a restaurant was $45.68 after leaving a 20% tip. What was the original bill? Round to the nearest cent.
$38.07
Write an equation to represent a 45% increase. Using b for the original and c for the new amount.
1) b + 0.45b = c
2) (1 + 0.45)b = c
3) 1.45b = c
A recipe calls for 3/4 cups of sugar for every 6 servings of brownies. How much sugar is needed for 1 serving of brownies?
1/8 cups of sugar
Last year the population of parrots was 160. This year, the population decreased by 25%. How many parrots are there this year?
120 parrots
After Christmas, a store discounted all of their fake trees by 60%. If Jeremy bought a tree for $78. What was the original price of the tree?
$195
Write an equation to represent a 76% decrease. Using b for the original and c for the new amount.
1) b - 0.76b = c
2) (1 - 0.76)b = c
3) 0.24b = c
A recipe calls for 3/4 cups of sugar for every 6 servings of brownies. How much sugar is needed for 3 servings of brownies?
3/8 cups of sugar
A sofa that originally cost $2500 is on sale for 35% off. What is the sales price?
$1625
Mr. McMorris bought a new iPad for $950.13. The iPad was discounted by 10%. What was the original cost of the iPad?
$1,055.70
Write an equation to represent a 0.5% decrease. Using b for the original and c for the new amount.
1) b - 0.005b = c
2) (1 - 0.005)b = c
3) 0.995b = c
A specific color of purple paint requires 1/2 cans of red paint for 3/5 cans of blue paint. How much blue paint is needed for each can of red paint?
1 1/5 cans of blue paint
Mr. Gleghorn's cell phone bill was $50 last month. This month Verizon raised his bill by 2.5% of last month's. What is this month's bill?
What is $51.25
Your total bill at a restaurant was $45.68 after leaving a 18% tip. What was the original bill? Round to the nearest cent.
$38.71
Write three equations to represent a 3.2% increase. Using b for the original and c for the new amount.
1) b + 0.032b = c
2) (1 + 0.032)b = c
3) 1.032b = c
A specific color of purple paint requires 1/2 cans of red paint for 3/5 cans of blue paint. How much red paint is needed for each can of blue paint?
5/6 can of red paint
The candy lady paid $0.75 for each pack of Now and Laters. If she marked up the price by 25%, how much did she charge for each pack of Now and Laters? Round to the nearest cent.
$0.94
A pair of jeans was $36.55 after 9.5% tax was included. What was the original cost of the jeans? Round to the nearest cent.
$33.38
Write three equations to represent a 4.28% decrease. Using b for the original and c for the new amount.
1) b - 0.0428b = c
2) (1 - 0.0428)b = c
3) 0.9572b = c
A recipe calls for 2 1/2 cups of flour for 1/4 cups of chocolate chips. How many cups of flour are needed for 1 cup of chocolate chips?
10 cups of flour