61.93% is the change from 507 to 821
Calculation steps:
[( 821 - 507 ) ÷ 507] x 100 = 61.93%
Formula
Percentage change = [(821 - 507) / 507] x 100
Subtract the new number by the original number
821 - 507 = 314
314 ÷ 507 = 0.6193293885601578
0.6193293885601578 x 100 = 61.93%