-42.37% is the change from 236 to 136
Calculation steps:
[( 136 - 236 ) ÷ 236] x 100 = -42.37%
Formula
Percentage change = [(136 - 236) / 236] x 100
Subtract the new number by the original number
136 - 236 = -100
-100 ÷ 236 = -0.423728813559322
-0.423728813559322 x 100 = -42.37%
Example