85.5% is the change from 400 to 742
Calculation steps:
[( 742 - 400 ) ÷ 400] x 100 = 85.5%
Formula
Percentage change = [(742 - 400) / 400] x 100
Subtract the new number by the original number
742 - 400 = 342
342 ÷ 400 = 0.855
0.855 x 100 = 85.5%
Example