Hello,
The comparison in your formula will always be False, because A1 is a number and it is compared with a text string. What you could do instead is
=IF(RIGHT(TEXT(A1,"0.00"),2)="01","yes","no")
The formula formats the number with two decimal points (regardless of what is actually showing in the cell) and converts it into a text string. Then the rightmost two characters are inspected and compared with the text "01"
This way, text is compared with text.
cheers,
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