Change the physical value of a cell instead of visual with roundup function

Hello!

I want to round up a value and use this value in vlookup function. When excel reads the cell he uses the underlying value.

Example: 300/7 = 42,85714286
H8=ROUNDUP(H7;2) = 42.86

table
42.85 X
42.86 Y

=vlookup(H8;"range";1;false) will return X and not Y

I've tried trunc() as well, but doesn't work

Can anyone help me with this problem?