-91.18% is the change from 136 to 12
Calculation steps:
[( 12 - 136 ) ÷ 136] x 100 = -91.18%
Formula
Percentage change = [(12 - 136) / 136] x 100
Subtract the new number by the original number
12 - 136 = -124
-124 ÷ 136 = -0.9117647058823529
-0.9117647058823529 x 100 = -91.18%