-52.59% is the change from 135 to 64
Calculation steps:
[( 64 - 135 ) ÷ 135] x 100 = -52.59%
Formula
Percentage change = [(64 - 135) / 135] x 100
Subtract the new number by the original number
64 - 135 = -71
-71 ÷ 135 = -0.5259259259259259
-0.5259259259259259 x 100 = -52.59%