Question

Problem Page The price of a notebook was $3.90 yesterday. Today, the price fell to $3.40 . Find the percentage decrease. Round your answer to the nearest tenth of a percent.

Answer 1

Always find the difference in prices first. 
3.45 - 3.20 = $.25 difference 

Always divide the difference by the original price. Change this number into a per cent. 
.25/3.45 = .07246 = 7.2% decrease 

Answer 2

the percentage that 3.90 to 3.40 droped is -13%