83.5% is the change from 400 to 734
Calculation steps:
[( 734 - 400 ) ÷ 400] x 100 = 83.5%
Formula
Percentage change = [(734 - 400) / 400] x 100
Subtract the new number by the original number
734 - 400 = 334
334 ÷ 400 = 0.835
0.835 x 100 = 83.5%
Example