Vlookup can not find match from table

[kakha11]

Hello, I've met a issue and can not manage to guess what's the problem. I wanted to find in table #1 X+Y match from Table #2. Vlookup can find match with some number combination and struggle to find match with some. You can also find attached excel.

Can anyone explain me, why is this happening? 

Table #1

X	Y	=X+Y	Vlookup(X+Y)
67%	10%	77%	Pass
54%	7%	61%	#N/A

Table #2

Vlookup Table
77%	Pass
61%	Pass

[#2 · Accepted solution]

@kakha11 

This will give you the details:

https://support.microsoft.com/en-us/help/315961/the-vlookup-and-hlookup-functions-fail-to-find-a-num...

Your workaround:

=VLOOKUP(TRUNC(D4,2),B7:C8,2,0)