-68.62% is the change from 290 to 91
Calculation steps:
[( 91 - 290 ) ÷ 290] x 100 = -68.62%
Formula
Percentage change = [(91 - 290) / 290] x 100
Subtract the new number by the original number
91 - 290 = -199
-199 ÷ 290 = -0.6862068965517242
-0.6862068965517242 x 100 = -68.62%