-64.63% is the change from 721 to 255
Calculation steps:
[( 255 - 721 ) ÷ 721] x 100 = -64.63%
Formula
Percentage change = [(255 - 721) / 721] x 100
Subtract the new number by the original number
255 - 721 = -466
-466 ÷ 721 = -0.6463245492371706
-0.6463245492371706 x 100 = -64.63%