55.34% is the change from 515 to 800
Calculation steps:
[( 800 - 515 ) ÷ 515] x 100 = 55.34%
Formula
Percentage change = [(800 - 515) / 515] x 100
Subtract the new number by the original number
800 - 515 = 285
285 ÷ 515 = 0.5533980582524272
0.5533980582524272 x 100 = 55.34%