50.2% is the change from 510 to 766
Calculation steps:
[( 766 - 510 ) ÷ 510] x 100 = 50.2%
Formula
Percentage change = [(766 - 510) / 510] x 100
Subtract the new number by the original number
766 - 510 = 256
256 ÷ 510 = 0.5019607843137255
0.5019607843137255 x 100 = 50.2%
Example