Conditional Formatting Formula to highlight all matching values found in another table

I am looking to use conditional formatting to highlight all values in the table that are found in another table. I am new to formulas for conditional formatting so please forgive my ignorance.

So

Table A                              Table B

*10 x 2*                             13 x 26
8 x 6                                20 x 20
*4 x 9*                              18 x 6
3 x 1                                40 x 1
18 x 2                               10 x 2
*6 x 6*                              4 x 9
*13 x 26*                            10 x 15
79 x 2                               6 x 6

So the formula will be conditional formatting for Table A, searching Table B for any matching values and highlight them in table A. In the above example * * serves as highlighting.

I have tried using countif/s but that is very clearly the wrong direction for conditional formatting. Other solutions I have found are only searching for specific words or phrases not searching all data in tables and matching.

Thanks in advance.

So here is a quick example:

• Define Name the Table B as CheckList
• Select the Table A and Hit ALT+H+L+N
• On doing above opens the New Formatting Rule Window
• Select the last rule - Use a formula to determine which cells to format
• Enter the following formula

=MATCH(A2,CheckList,0)

• Click on format and use specific formatting as per your preference
• Click OK Twice.