69.86% is the change from 501 to 851
Calculation steps:
[( 851 - 501 ) ÷ 501] x 100 = 69.86%
Formula
Percentage change = [(851 - 501) / 501] x 100
Subtract the new number by the original number
851 - 501 = 350
350 ÷ 501 = 0.6986027944111777
0.6986027944111777 x 100 = 69.86%