107.25% is the change from 400 to 829
Calculation steps:
[( 829 - 400 ) ÷ 400] x 100 = 107.25%
Formula
Percentage change = [(829 - 400) / 400] x 100
Subtract the new number by the original number
829 - 400 = 429
429 ÷ 400 = 1.0725
1.0725 x 100 = 107.25%