-72.92% is the change from 336 to 91
Calculation steps:
[( 91 - 336 ) ÷ 336] x 100 = -72.92%
Formula
Percentage change = [(91 - 336) / 336] x 100
Subtract the new number by the original number
91 - 336 = -245
-245 ÷ 336 = -0.7291666666666666
-0.7291666666666666 x 100 = -72.92%