79.01% is the change from 505 to 904
Calculation steps:
[( 904 - 505 ) ÷ 505] x 100 = 79.01%
Formula
Percentage change = [(904 - 505) / 505] x 100
Subtract the new number by the original number
904 - 505 = 399
399 ÷ 505 = 0.7900990099009901
0.7900990099009901 x 100 = 79.01%