-20.07% is the change from 902 to 721
Calculation steps:
[( 721 - 902 ) ÷ 902] x 100 = -20.07%
Formula
Percentage change = [(721 - 902) / 902] x 100
Subtract the new number by the original number
721 - 902 = -181
-181 ÷ 902 = -0.2006651884700665
-0.2006651884700665 x 100 = -20.07%