50.88% is the change from 511 to 771
Calculation steps:
[( 771 - 511 ) ÷ 511] x 100 = 50.88%
Formula
Percentage change = [(771 - 511) / 511] x 100
Subtract the new number by the original number
771 - 511 = 260
260 ÷ 511 = 0.5088062622309197
0.5088062622309197 x 100 = 50.88%