-66.04% is the change from 268 to 91
Calculation steps:
[( 91 - 268 ) ÷ 268] x 100 = -66.04%
Formula
Percentage change = [(91 - 268) / 268] x 100
Subtract the new number by the original number
91 - 268 = -177
-177 ÷ 268 = -0.6604477611940298
-0.6604477611940298 x 100 = -66.04%