-11.65% is the change from 721 to 637
Calculation steps:
[( 637 - 721 ) ÷ 721] x 100 = -11.65%
Formula
Percentage change = [(637 - 721) / 721] x 100
Subtract the new number by the original number
637 - 721 = -84
-84 ÷ 721 = -0.11650485436893204
-0.11650485436893204 x 100 = -11.65%