Heather sells cosmetics for a local company. During her first month of employment her sales were $60. During her second month her sales were $300. What was Heather's percent of increase in sales?

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ANSWER

400%

EXPLANATION

The percent of increase between two values is:

[tex]\frac{\text{ final value - starting value}}{\text{ starting value}}\times100[/tex]

In this problem the final value is 300 and the starting value is 60:

[tex]\frac{300-60}{60}\times100=\frac{240}{60}\times100=4\times100=400\text{ \%}[/tex]