Quick Definition: A Mixed Fraction is a
whole number and a fraction combined, such as 1 34 ![]()
Create a simple formula to add and subtract in an Excel spreadsheet. You can add and subtract two or more numbers in one cell, or add and subtract numbers.
To make it easy to add and subtract them, just convert to Improper Fractions first:
Can you see that 134 is the same as 74 ?
Adding Mixed Fractions
I find this is the best way to add mixed fractions:
(You may like to read how to Convert from or to Mixed Fractions)
Example: What is 2 34 + 3 12 ?
Convert to Improper Fractions:
2 34 = 114 3 12 = 72
Common denominator of 4:
114 stays as 114 72 becomes 144
Now Add:
114 + 144 = 254
Convert back to Mixed Fractions:
254 = 6 14
When you get more experience you can do it faster like this example:
Example: What is 3 58 + 1 34
Convert them to improper fractions:
3 58 = 298
1 34 = 74
Make same denominator: 74 becomes 148 (by multiplying top and bottom by 2)
And add:
298 + 148 = 438 = 5 38
Subtracting Mixed Fractions
Just follow the same method, but subtract instead of add:
Example: What is 15 34 − 8 56 ?![]()
Convert to Improper Fractions:
15 34 = 634 8 56 = 536
Common denominator of 12:
634 becomes 18912 536 becomes 10612
Now Subtract:
18912 − 10612 = 8312
Convert back to Mixed Fractions:
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