-62.96% is the change from 135 to 50
Calculation steps:
[( 50 - 135 ) ÷ 135] x 100 = -62.96%
Formula
Percentage change = [(50 - 135) / 135] x 100
Subtract the new number by the original number
50 - 135 = -85
-85 ÷ 135 = -0.6296296296296297
-0.6296296296296297 x 100 = -62.96%