-87.22% is the change from 712 to 91
Calculation steps:
[( 91 - 712 ) ÷ 712] x 100 = -87.22%
Formula
Percentage change = [(91 - 712) / 712] x 100
Subtract the new number by the original number
91 - 712 = -621
-621 ÷ 712 = -0.8721910112359551
-0.8721910112359551 x 100 = -87.22%