-8.04% is the change from 721 to 663
Calculation steps:
[( 663 - 721 ) ÷ 721] x 100 = -8.04%
Formula
Percentage change = [(663 - 721) / 721] x 100
Subtract the new number by the original number
663 - 721 = -58
-58 ÷ 721 = -0.08044382801664356
-0.08044382801664356 x 100 = -8.04%