-77.59% is the change from 406 to 91
Calculation steps:
[( 91 - 406 ) ÷ 406] x 100 = -77.59%
Formula
Percentage change = [(91 - 406) / 406] x 100
Subtract the new number by the original number
91 - 406 = -315
-315 ÷ 406 = -0.7758620689655172
-0.7758620689655172 x 100 = -77.59%