-8.88% is the change from 721 to 657
Calculation steps:
[( 657 - 721 ) ÷ 721] x 100 = -8.88%
Formula
Percentage change = [(657 - 721) / 721] x 100
Subtract the new number by the original number
657 - 721 = -64
-64 ÷ 721 = -0.08876560332871013
-0.08876560332871013 x 100 = -8.88%