# Conditional formatting

#### Ineedhelpaz

##### New Member
Excel 2007 question

I am attempting to highlight several thousand values in column B based on values in column A. An example...

A. B.

1. 1.
2. 1.
3. 2.
5. 4.
10. 9.

If 1, 2, 3, 5, 10 occur in column B at all I need all instances of them highlighted. Using duplicate values does not work since duplicate values in B that don't exist in A are highlighted.

Last edited:

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#### skywriter

##### Well-known Member
In the example below. I select cells B1:B5, I go to conditional formatting and I new rule, use a formula to decide which cells to format. I then enter the formula: =COUNTIF(\$A\$1:\$A\$5,B1), then choose a yellow fill if my equation evaluates to true. You get the results shown below.

Excel Workbook
AB
110
225
334
4510
5108
Sheet35
Cells with Conditional Formatting
CellConditionCell FormatStop If True
B11. / Formula is =COUNTIF(\$A\$1:\$A\$5,B1)Abc
B21. / Formula is =COUNTIF(\$A\$1:\$A\$5,B1)Abc
B31. / Formula is =COUNTIF(\$A\$1:\$A\$5,B1)Abc
B41. / Formula is =COUNTIF(\$A\$1:\$A\$5,B1)Abc
B51. / Formula is =COUNTIF(\$A\$1:\$A\$5,B1)Abc

Last edited:

#### Ineedhelpaz

##### New Member
I filled out formula exactly as you did and it worked but it is not working consistently. Some groups of numbers are labelled in all instances, some aren't labelled at all and some are even half and half (one filled one empty)

#### Ineedhelpaz

##### New Member
Nevermind. I wiped the first one, retyped, and chose a different color and the error stopped.

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