-9.71% is the change from 721 to 651
Calculation steps:
[( 651 - 721 ) ÷ 721] x 100 = -9.71%
Formula
Percentage change = [(651 - 721) / 721] x 100
Subtract the new number by the original number
651 - 721 = -70
-70 ÷ 721 = -0.0970873786407767
-0.0970873786407767 x 100 = -9.71%