-61.44% is the change from 236 to 91
Calculation steps:
[( 91 - 236 ) ÷ 236] x 100 = -61.44%
Formula
Percentage change = [(91 - 236) / 236] x 100
Subtract the new number by the original number
91 - 236 = -145
-145 ÷ 236 = -0.614406779661017
-0.614406779661017 x 100 = -61.44%