49.13% is the change from 515 to 768
Calculation steps:
[( 768 - 515 ) ÷ 515] x 100 = 49.13%
Formula
Percentage change = [(768 - 515) / 515] x 100
Subtract the new number by the original number
768 - 515 = 253
253 ÷ 515 = 0.4912621359223301
0.4912621359223301 x 100 = 49.13%