79.29% is the change from 280 to 502
Calculation steps:
[( 502 - 280 ) ÷ 280] x 100 = 79.29%
Formula
Percentage change = [(502 - 280) / 280] x 100
Subtract the new number by the original number
502 - 280 = 222
222 ÷ 280 = 0.7928571428571428
0.7928571428571428 x 100 = 79.29%