The price of a cup of coffee has dropped to $2.10 today. Yesterday's price was $2.45. Find the percentage decrease. Round your answer to the nearest tenth of a percent.

Question

Help Math Homework!

Answer 1

This is a percent of change question.

Percent of change = amount of change as percent of original amount.

To reach $2.10 from $2.45 is a decrease of $.35.

So we have:

(amt of change)/(original amt.) = %/100 --> .35/2.45 = %/100

(.35)(100)/2.45 = % = 14.2857...

The price decreased by about 14.3%