69.52% is the change from 502 to 851
Calculation steps:
[( 851 - 502 ) ÷ 502] x 100 = 69.52%
Formula
Percentage change = [(851 - 502) / 502] x 100
Subtract the new number by the original number
851 - 502 = 349
349 ÷ 502 = 0.6952191235059761
0.6952191235059761 x 100 = 69.52%