-23.58% is the change from 721 to 551
Calculation steps:
[( 551 - 721 ) ÷ 721] x 100 = -23.58%
Formula
Percentage change = [(551 - 721) / 721] x 100
Subtract the new number by the original number
551 - 721 = -170
-170 ÷ 721 = -0.23578363384188628
-0.23578363384188628 x 100 = -23.58%