64.94% is the change from 502 to 828
Calculation steps:
[( 828 - 502 ) ÷ 502] x 100 = 64.94%
Formula
Percentage change = [(828 - 502) / 502] x 100
Subtract the new number by the original number
828 - 502 = 326
326 ÷ 502 = 0.649402390438247
0.649402390438247 x 100 = 64.94%