-64.86% is the change from 259 to 91
Calculation steps:
[( 91 - 259 ) ÷ 259] x 100 = -64.86%
Formula
Percentage change = [(91 - 259) / 259] x 100
Subtract the new number by the original number
91 - 259 = -168
-168 ÷ 259 = -0.6486486486486487
-0.6486486486486487 x 100 = -64.86%