-80.15% is the change from 136 to 27
Calculation steps:
[( 27 - 136 ) ÷ 136] x 100 = -80.15%
Formula
Percentage change = [(27 - 136) / 136] x 100
Subtract the new number by the original number
27 - 136 = -109
-109 ÷ 136 = -0.8014705882352942
-0.8014705882352942 x 100 = -80.15%