Percent Increase

and Decrease

Determine whether the change is an increase or

decrease. Then obtain the percent of increase or

decrease. Round the answer to the nearest whole percent.

old: 168 kilogramsnew: 122 kilograms

1.

Determine whether the change is an increase or decrease. Then obtain

the percent of increase or decrease. Round the answer to the nearest

whole percent.

old: 345 acresnew: 380 acres

2.

Determine whether the change is an increase or

decrease. Then obtain the percent of increase or

decrease. Round the answer to the nearest whole percent.

old: $315new: $360

3.

Determine whether the change is an increase or

decrease. Then obtain the percent of increase or

decrease. Round the answer to the nearest whole percent.

old: 78 yearsnew: 114 years

4.

The number of participants in an athletic competition increases from 312 to 351. Find the percent of increase.

5.

In 2000, Mary’s height was 61 cm. In 2010, she grew to 130 cm. Find

the percent increase in Mary’s

height.6.

Calculate the % of change.

Before: $130 After: $270

7.

Calculate the % of change.

Before: $130 After: $270

8.

Calculate the % of change.

Before: $965 After: $1544

9.

Find the markup for the given values of cost and percent of markup.

Cost: $2.70

Percent of markup: 80%10.

Find the markup for the given values of cost and percent of markup.

Cost: $2.70

Percent of markup: 80%11.

Find the discount for the given values of price and percent of discount.

Regular price: $36.60

Percent of discount: 40%12.

Find the selling price for the given values of cost and percent of markup. Round to the nearest cent wherever necessary.

Cost: $8.00

Percent markup: 65%13.

Find the selling price for the given values of regular price and percent of discount. Round to the nearest cent wherever necessary.

Regular Price: $17.44

Percent of discount: 18%14.

The original cost of an item is $15.40. You mark it up 15% before reselling it.

How much money did you make?

15.

The regular selling price of a jacket is $75. The shop is offering a discount of 30%.

a) Find the discount.

b) Find the sale price.

16.

The regular selling price of an item at Shop A is $32.25. The shop offers a discount of 20%. The regular selling price of the same item at shop B is

$43.35 and the discount is 40%. Which shop offers the lowest sale price? Also,

find out the difference in the sale prices.

17.

Spanish Club was able to sell bags of popcorn for $1.00 each last year. Due to an increase in the price to purchase the popcorn, this year’s price is $2.00 per bag. What is the

percent increase?

18.

The electricity bill was $250 in July and $75 in December.

What was the percent decrease?

19.

The price of Online Math stock rises from $50 to $200 per share. What was the

percent increase?20.