Rounding Numerical Substrings

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To find a formula that will retrieve the output by rounding numerical substrings to 3 decimal places, we will use a combination of LEFT, FIND, MID & ROUND functions to retrieve the output.

Let’s say cell A1 contains 12.34567<>3.4567and the output required is 12.346<>3.457

LEFT: Returns the specified number of characters from the start of a text string.

Syntax: =LEFT(text,num_chars)

FIND: Returns the starting position of one text string within another text string. FIND is a case sensitive command.

Syntax: =FIND(find_text,within_text,start_num)

MID: It returns the characters from the middle of a text string, given a starting position and length.

Syntax: =MID(text,start_num,num_chars)

ROUND: Rounds a number to a specified number of digits.

Syntax: =ROUND(number,num_digits)
Let us take an example:

We have a number as 12.34567<>3.4567 in cell A1. We need a formula to show the number to be rounded off by 3 decimal places.

  • In cell C2, the formula would be
  • =ROUND(LEFT(A2,FIND(“<>”,A2)-1),3)&”<>”&ROUND(MID(A2,FIND(“<>”,A2)+2,255),3)
  • Press enter on your keyboard.
  • The function will return the rounded numerical substring.


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