-87.5% is the change from 272 to 34
Calculation steps:
[( 34 - 272 ) ÷ 272] x 100 = -87.5%
Formula
Percentage change = [(34 - 272) / 272] x 100
Subtract the new number by the original number
34 - 272 = -238
-238 ÷ 272 = -0.875
-0.875 x 100 = -87.5%
Example