102.51% is the change from 398 to 806
Calculation steps:
[( 806 - 398 ) ÷ 398] x 100 = 102.51%
Formula
Percentage change = [(806 - 398) / 398] x 100
Subtract the new number by the original number
806 - 398 = 408
408 ÷ 398 = 1.0251256281407035
1.0251256281407035 x 100 = 102.51%