-30.4% is the change from 727 to 506
Calculation steps:
[( 506 - 727 ) ÷ 727] x 100 = -30.4%
Formula
Percentage change = [(506 - 727) / 727] x 100
Subtract the new number by the original number
506 - 727 = -221
-221 ÷ 727 = -0.30398899587345257
-0.30398899587345257 x 100 = -30.4%