-10.54% is the change from 721 to 645
Calculation steps:
[( 645 - 721 ) ÷ 721] x 100 = -10.54%
Formula
Percentage change = [(645 - 721) / 721] x 100
Subtract the new number by the original number
645 - 721 = -76
-76 ÷ 721 = -0.10540915395284327
-0.10540915395284327 x 100 = -10.54%