-29.81% is the change from 728 to 511
Calculation steps:
[( 511 - 728 ) ÷ 728] x 100 = -29.81%
Formula
Percentage change = [(511 - 728) / 728] x 100
Subtract the new number by the original number
511 - 728 = -217
-217 ÷ 728 = -0.2980769230769231
-0.2980769230769231 x 100 = -29.81%