-30% is the change from 730 to 511
Calculation steps:
[( 511 - 730 ) ÷ 730] x 100 = -30%
Formula
Percentage change = [(511 - 730) / 730] x 100
Subtract the new number by the original number
511 - 730 = -219
-219 ÷ 730 = -0.3
-0.3 x 100 = -30%
Example