David,
On my testing:

Incorrect match: doesn't pick up incorrect "a" in sentance

This is a very long sentence to test for match
This is a very long sentance to test for match

Correct match: finds missing "s" in sentence

This is a very long entence to test for match
This is a very long sentance to test for match

... and here too...

This is a very long entence to test for match
This is a very long sentence to test for match


and it outputs postion of last character that matches (20 in correct match
above but 46 in incorrect one).

Comparing ...

abcdfg

axcdef

returns an answer of 4 rather than 1.

Over to you!

"David Billigmeier" wrote:

This one will work... it's a long one. It will output the position of the
last 2 characters that match. It assumes the "first" string is in A1 and the
"second" is in A2. To finally get the percentage value divide the whole
thing by LEN(A1). Also, make sure to commit it with CTRL+SHIFT+ENTER:

=MAX(ROW(INDIRECT("1:"&MAX(LEN(A1),LEN(A2))))*(MID (A1,ROW(INDIRECT("1:"&MAX(LEN(A1),LEN(A2)))),1)=MI D(A2,ROW(INDIRECT("1:"&MAX(LEN(A1),LEN(A2)))),1)))

--
Regards,
Dave


"andy62" wrote:

I am wondering if there is any trick for identifying how much of a match two
text strings are? In my case, the two strings would start the same, but then
differ somewhere in the middle or the end. If I could identify the character
position where the difference occurs that would help me - and then maybe
divide that number by the length in characters of the first string to get a
percentage.

TIA