109.27% is the change from 399 to 835
Calculation steps:
[( 835 - 399 ) ÷ 399] x 100 = 109.27%
Formula
Percentage change = [(835 - 399) / 399] x 100
Subtract the new number by the original number
835 - 399 = 436
436 ÷ 399 = 1.0927318295739348
1.0927318295739348 x 100 = 109.27%