-72.42% is the change from 330 to 91
Calculation steps:
[( 91 - 330 ) ÷ 330] x 100 = -72.42%
Formula
Percentage change = [(91 - 330) / 330] x 100
Subtract the new number by the original number
91 - 330 = -239
-239 ÷ 330 = -0.7242424242424242
-0.7242424242424242 x 100 = -72.42%