51.07% is the change from 515 to 778
Calculation steps:
[( 778 - 515 ) ÷ 515] x 100 = 51.07%
Formula
Percentage change = [(778 - 515) / 515] x 100
Subtract the new number by the original number
778 - 515 = 263
263 ÷ 515 = 0.5106796116504855
0.5106796116504855 x 100 = 51.07%
Example