54.9% is the change from 510 to 790
Calculation steps:
[( 790 - 510 ) ÷ 510] x 100 = 54.9%
Formula
Percentage change = [(790 - 510) / 510] x 100
Subtract the new number by the original number
790 - 510 = 280
280 ÷ 510 = 0.5490196078431373
0.5490196078431373 x 100 = 54.9%