99.5% is the change from 398 to 794
Calculation steps:
[( 794 - 398 ) ÷ 398] x 100 = 99.5%
Formula
Percentage change = [(794 - 398) / 398] x 100
Subtract the new number by the original number
794 - 398 = 396
396 ÷ 398 = 0.9949748743718593
0.9949748743718593 x 100 = 99.5%