Question

increase 400 by 37%

Answer 1

400*.37=148
400+148=548

Answer 2

Here, It would be: 400 + (400 * 37%)
= 400 + (400 * 0.37)    [ 37% = 0.37 ]
= 400 + 148
= 548

In short, Your Answer would be: 548

Hope this helps!