-35.24% is the change from 210 to 136
Calculation steps:
[( 136 - 210 ) ÷ 210] x 100 = -35.24%
Formula
Percentage change = [(136 - 210) / 210] x 100
Subtract the new number by the original number
136 - 210 = -74
-74 ÷ 210 = -0.3523809523809524
-0.3523809523809524 x 100 = -35.24%