-87.2% is the change from 711 to 91
Calculation steps:
[( 91 - 711 ) ÷ 711] x 100 = -87.2%
Formula
Percentage change = [(91 - 711) / 711] x 100
Subtract the new number by the original number
91 - 711 = -620
-620 ÷ 711 = -0.8720112517580872
-0.8720112517580872 x 100 = -87.2%