81.47% is the change from 502 to 911
Calculation steps:
[( 911 - 502 ) ÷ 502] x 100 = 81.47%
Formula
Percentage change = [(911 - 502) / 502] x 100
Subtract the new number by the original number
911 - 502 = 409
409 ÷ 502 = 0.8147410358565738
0.8147410358565738 x 100 = 81.47%