-77.94% is the change from 136 to 30
Calculation steps:
[( 30 - 136 ) ÷ 136] x 100 = -77.94%
Formula
Percentage change = [(30 - 136) / 136] x 100
Subtract the new number by the original number
30 - 136 = -106
-106 ÷ 136 = -0.7794117647058824
-0.7794117647058824 x 100 = -77.94%