73.4% is the change from 470 to 815
Calculation steps:
[( 815 - 470 ) ÷ 470] x 100 = 73.4%
Formula
Percentage change = [(815 - 470) / 470] x 100
Subtract the new number by the original number
815 - 470 = 345
345 ÷ 470 = 0.7340425531914894
0.7340425531914894 x 100 = 73.4%