-87.43% is the change from 724 to 91
Calculation steps:
[( 91 - 724 ) ÷ 724] x 100 = -87.43%
Formula
Percentage change = [(91 - 724) / 724] x 100
Subtract the new number by the original number
91 - 724 = -633
-633 ÷ 724 = -0.8743093922651933
-0.8743093922651933 x 100 = -87.43%