68.16% is the change from 515 to 866
Calculation steps:
[( 866 - 515 ) ÷ 515] x 100 = 68.16%
Formula
Percentage change = [(866 - 515) / 515] x 100
Subtract the new number by the original number
866 - 515 = 351
351 ÷ 515 = 0.6815533980582524
0.6815533980582524 x 100 = 68.16%