50.1% is the change from 511 to 767
Calculation steps:
[( 767 - 511 ) ÷ 511] x 100 = 50.1%
Formula
Percentage change = [(767 - 511) / 511] x 100
Subtract the new number by the original number
767 - 511 = 256
256 ÷ 511 = 0.5009784735812133
0.5009784735812133 x 100 = 50.1%