-87.41% is the change from 270 to 34
Calculation steps:
[( 34 - 270 ) ÷ 270] x 100 = -87.41%
Formula
Percentage change = [(34 - 270) / 270] x 100
Subtract the new number by the original number
34 - 270 = -236
-236 ÷ 270 = -0.8740740740740741
-0.8740740740740741 x 100 = -87.41%