61.74% is the change from 507 to 820
Calculation steps:
[( 820 - 507 ) ÷ 507] x 100 = 61.74%
Formula
Percentage change = [(820 - 507) / 507] x 100
Subtract the new number by the original number
820 - 507 = 313
313 ÷ 507 = 0.6173570019723866
0.6173570019723866 x 100 = 61.74%