10.5% is the change from 400 to 442
Calculation steps:
[( 442 - 400 ) ÷ 400] x 100 = 10.5%
Formula
Percentage change = [(442 - 400) / 400] x 100
Subtract the new number by the original number
442 - 400 = 42
42 ÷ 400 = 0.105
0.105 x 100 = 10.5%
Example