-83.09% is the change from 136 to 23
Calculation steps:
[( 23 - 136 ) ÷ 136] x 100 = -83.09%
Formula
Percentage change = [(23 - 136) / 136] x 100
Subtract the new number by the original number
23 - 136 = -113
-113 ÷ 136 = -0.8308823529411765
-0.8308823529411765 x 100 = -83.09%