71.06% is the change from 501 to 857
Calculation steps:
[( 857 - 501 ) ÷ 501] x 100 = 71.06%
Formula
Percentage change = [(857 - 501) / 501] x 100
Subtract the new number by the original number
857 - 501 = 356
356 ÷ 501 = 0.7105788423153693
0.7105788423153693 x 100 = 71.06%