-30.01% is the change from 723 to 506
Calculation steps:
[( 506 - 723 ) ÷ 723] x 100 = -30.01%
Formula
Percentage change = [(506 - 723) / 723] x 100
Subtract the new number by the original number
506 - 723 = -217
-217 ÷ 723 = -0.30013831258644535
-0.30013831258644535 x 100 = -30.01%