-39.33% is the change from 150 to 91
Calculation steps:
[( 91 - 150 ) ÷ 150] x 100 = -39.33%
Formula
Percentage change = [(91 - 150) / 150] x 100
Subtract the new number by the original number
91 - 150 = -59
-59 ÷ 150 = -0.3933333333333333
-0.3933333333333333 x 100 = -39.33%