# Lesson Worksheet: Percentage Increase and Decrease Mathematics • 9th Grade

In this worksheet, we will practice increasing and decreasing by a percentage.

Q1:

A 40-meter piece of cloth shrinks by . What is the length of the cloth after shrinking?

Q2:

In 2000, a seminar’s attendance was about 43,900 people. If the attendance grew from 2000 to 2005, what was the approximate attendance in 2005?

Q3:

Matthew deposited \$6,800 into his bank account, which earned simple interest. How much will he have in his account after 19 years?

Q4:

Increase 40 by .

Q5:

A USB flash drive that has a regular price of \$59 is on sale at a discount. Determine its sale price.

Q6:

Decrease 45 by .

Q7:

Increase 45 by .

Q8:

Decrease 450 by .

Q9:

A mobile app, whose regular price is \$11.43, is on sale at a discount of . Find the sale price to the nearest cent.

Q10:

Sophia ordered a TV set online. The set cost \$1,629 in addition to a sales tax of . Determine, to the nearest cent, the total amount she paid.