Quadratic Roots from Decimal to Fraction

andreascostas

Board Regular
Joined
Jan 11, 2011
Messages
150
I found UDF that gives the roots to ax^2+bx+c=0 using the quadratic formula.
The roots are given in decimals. Is there an easy way to change the decimals to improper fractions?
Example: for 15x^2+52x+45=0 the unction returns the roots as -1.8 and -1.667 each in separate cells.
What I need is a way to change -1.8 to -9/5 and -1.667 to 5/3
Can that be done? And how do I format the cells?
 

Excel Facts

Control Word Wrap
Press Alt+Enter to move to a new row in a cell. Lets you control where the words wrap.
You should be able to accomplish this with number formats.

Highlight the range of cells you want this to affect, then right click on them and go to Format Cells>Number (Tab)>Custom and enter ?/? into the Type field.

Hope this helps!
 
Last edited:
Upvote 0
@andreascostas, given the nature of quadratic equations, you probably want to use MrKowz' method above, but use ??/?? as the Custom format.
 
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