-63.45% is the change from 249 to 91
Calculation steps:
[( 91 - 249 ) ÷ 249] x 100 = -63.45%
Formula
Percentage change = [(91 - 249) / 249] x 100
Subtract the new number by the original number
91 - 249 = -158
-158 ÷ 249 = -0.6345381526104418
-0.6345381526104418 x 100 = -63.45%