-33.58% is the change from 137 to 91
Calculation steps:
[( 91 - 137 ) ÷ 137] x 100 = -33.58%
Formula
Percentage change = [(91 - 137) / 137] x 100
Subtract the new number by the original number
91 - 137 = -46
-46 ÷ 137 = -0.3357664233576642
-0.3357664233576642 x 100 = -33.58%