15.64% is the change from 505 to 584
Calculation steps:
[( 584 - 505 ) ÷ 505] x 100 = 15.64%
Formula
Percentage change = [(584 - 505) / 505] x 100
Subtract the new number by the original number
584 - 505 = 79
79 ÷ 505 = 0.15643564356435644
0.15643564356435644 x 100 = 15.64%