69.9% is the change from 505 to 858
Calculation steps:
[( 858 - 505 ) ÷ 505] x 100 = 69.9%
Formula
Percentage change = [(858 - 505) / 505] x 100
Subtract the new number by the original number
858 - 505 = 353
353 ÷ 505 = 0.699009900990099
0.699009900990099 x 100 = 69.9%