72.63% is the change from 475 to 820
Calculation steps:
[( 820 - 475 ) ÷ 475] x 100 = 72.63%
Formula
Percentage change = [(820 - 475) / 475] x 100
Subtract the new number by the original number
820 - 475 = 345
345 ÷ 475 = 0.7263157894736842
0.7263157894736842 x 100 = 72.63%