-37.5% is the change from 272 to 170
Calculation steps:
[( 170 - 272 ) ÷ 272] x 100 = -37.5%
Formula
Percentage change = [(170 - 272) / 272] x 100
Subtract the new number by the original number
170 - 272 = -102
-102 ÷ 272 = -0.375
-0.375 x 100 = -37.5%