69.32% is the change from 502 to 850
Calculation steps:
[( 850 - 502 ) ÷ 502] x 100 = 69.32%
Formula
Percentage change = [(850 - 502) / 502] x 100
Subtract the new number by the original number
850 - 502 = 348
348 ÷ 502 = 0.6932270916334662
0.6932270916334662 x 100 = 69.32%