-87.27% is the change from 715 to 91
Calculation steps:
[( 91 - 715 ) ÷ 715] x 100 = -87.27%
Formula
Percentage change = [(91 - 715) / 715] x 100
Subtract the new number by the original number
91 - 715 = -624
-624 ÷ 715 = -0.8727272727272727
-0.8727272727272727 x 100 = -87.27%