-90.44% is the change from 136 to 13
Calculation steps:
[( 13 - 136 ) ÷ 136] x 100 = -90.44%
Formula
Percentage change = [(13 - 136) / 136] x 100
Subtract the new number by the original number
13 - 136 = -123
-123 ÷ 136 = -0.9044117647058824
-0.9044117647058824 x 100 = -90.44%