-65.79% is the change from 266 to 91
Calculation steps:
[( 91 - 266 ) ÷ 266] x 100 = -65.79%
Formula
Percentage change = [(91 - 266) / 266] x 100
Subtract the new number by the original number
91 - 266 = -175
-175 ÷ 266 = -0.6578947368421053
-0.6578947368421053 x 100 = -65.79%