101% is the change from 399 to 802
Calculation steps:
[( 802 - 399 ) ÷ 399] x 100 = 101%
Formula
Percentage change = [(802 - 399) / 399] x 100
Subtract the new number by the original number
802 - 399 = 403
403 ÷ 399 = 1.0100250626566416
1.0100250626566416 x 100 = 101%