The price of an item has dropped to $81 today. Yesterday it was $180 . Find the percentage decrease

Question

percentage decrease word problem 

Answer 1

Here's the basic logic...

81 is what percent of 180?

 

81 = (x/100)(180)

 

x = 8100/180 = 810/18 = 90/2 = 45%

 

81 is 45% of 180.

This means the percent decrease is 100 - 45 = 55% decrease

Answer 2

Take the answer from Mark's formula and then multiply by 100 to be a percent instead of a decimal answer.

Answer 3

(180 - 81) / 180 = ?