-65.13% is the change from 261 to 91
Calculation steps:
[( 91 - 261 ) ÷ 261] x 100 = -65.13%
Formula
Percentage change = [(91 - 261) / 261] x 100
Subtract the new number by the original number
91 - 261 = -170
-170 ÷ 261 = -0.6513409961685823
-0.6513409961685823 x 100 = -65.13%