80.78% is the change from 515 to 931
Calculation steps:
[( 931 - 515 ) ÷ 515] x 100 = 80.78%
Formula
Percentage change = [(931 - 515) / 515] x 100
Subtract the new number by the original number
931 - 515 = 416
416 ÷ 515 = 0.8077669902912621
0.8077669902912621 x 100 = 80.78%