-50.37% is the change from 270 to 134
Calculation steps:
[( 134 - 270 ) ÷ 270] x 100 = -50.37%
Formula
Percentage change = [(134 - 270) / 270] x 100
Subtract the new number by the original number
134 - 270 = -136
-136 ÷ 270 = -0.5037037037037037
-0.5037037037037037 x 100 = -50.37%