-38.97% is the change from 136 to 83
Calculation steps:
[( 83 - 136 ) ÷ 136] x 100 = -38.97%
Formula
Percentage change = [(83 - 136) / 136] x 100
Subtract the new number by the original number
83 - 136 = -53
-53 ÷ 136 = -0.3897058823529412
-0.3897058823529412 x 100 = -38.97%