54.21% is the change from 511 to 788
Calculation steps:
[( 788 - 511 ) ÷ 511] x 100 = 54.21%
Formula
Percentage change = [(788 - 511) / 511] x 100
Subtract the new number by the original number
788 - 511 = 277
277 ÷ 511 = 0.5420743639921722
0.5420743639921722 x 100 = 54.21%