-30.14% is the change from 730 to 510
Calculation steps:
[( 510 - 730 ) ÷ 730] x 100 = -30.14%
Formula
Percentage change = [(510 - 730) / 730] x 100
Subtract the new number by the original number
510 - 730 = -220
-220 ÷ 730 = -0.3013698630136986
-0.3013698630136986 x 100 = -30.14%