-71.01% is the change from 721 to 209
Calculation steps:
[( 209 - 721 ) ÷ 721] x 100 = -71.01%
Formula
Percentage change = [(209 - 721) / 721] x 100
Subtract the new number by the original number
209 - 721 = -512
-512 ÷ 721 = -0.710124826629681
-0.710124826629681 x 100 = -71.01%