49.71% is the change from 515 to 771
Calculation steps:
[( 771 - 515 ) ÷ 515] x 100 = 49.71%
Formula
Percentage change = [(771 - 515) / 515] x 100
Subtract the new number by the original number
771 - 515 = 256
256 ÷ 515 = 0.4970873786407767
0.4970873786407767 x 100 = 49.71%