61.14% is the change from 507 to 817
Calculation steps:
[( 817 - 507 ) ÷ 507] x 100 = 61.14%
Formula
Percentage change = [(817 - 507) / 507] x 100
Subtract the new number by the original number
817 - 507 = 310
310 ÷ 507 = 0.611439842209073
0.611439842209073 x 100 = 61.14%