51.86% is the change from 511 to 776
Calculation steps:
[( 776 - 511 ) ÷ 511] x 100 = 51.86%
Formula
Percentage change = [(776 - 511) / 511] x 100
Subtract the new number by the original number
776 - 511 = 265
265 ÷ 511 = 0.5185909980430529
0.5185909980430529 x 100 = 51.86%