How to find the percent of increase Practice Test

Phoenicia is a grocery store that is expanding quickly.

In 2011 Phoenicia's total sales were \$1,800,800.

In 2012 their sales rose to \$2,130,346.

By what percentage did the store increase its income from 2011 to 2012.

(Round answer to the nearest tenth.)

The radius of a given circle is increased by 20%. What is the percent increase of the area of the circle.