-87.7% is the change from 740 to 91
Calculation steps:
[( 91 - 740 ) ÷ 740] x 100 = -87.7%
Formula
Percentage change = [(91 - 740) / 740] x 100
Subtract the new number by the original number
91 - 740 = -649
-649 ÷ 740 = -0.8770270270270271
-0.8770270270270271 x 100 = -87.7%