70.72% is the change from 502 to 857
Calculation steps:
[( 857 - 502 ) ÷ 502] x 100 = 70.72%
Formula
Percentage change = [(857 - 502) / 502] x 100
Subtract the new number by the original number
857 - 502 = 355
355 ÷ 502 = 0.7071713147410359
0.7071713147410359 x 100 = 70.72%