-72.34% is the change from 329 to 91
Calculation steps:
[( 91 - 329 ) ÷ 329] x 100 = -72.34%
Formula
Percentage change = [(91 - 329) / 329] x 100
Subtract the new number by the original number
91 - 329 = -238
-238 ÷ 329 = -0.723404255319149
-0.723404255319149 x 100 = -72.34%