74.47% is the change from 470 to 820
Calculation steps:
[( 820 - 470 ) ÷ 470] x 100 = 74.47%
Formula
Percentage change = [(820 - 470) / 470] x 100
Subtract the new number by the original number
820 - 470 = 350
350 ÷ 470 = 0.7446808510638298
0.7446808510638298 x 100 = 74.47%