19 lines
481 B
Markdown
19 lines
481 B
Markdown
---
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title: Subtracting Fractions
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---
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## Subtracting Fractions
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Subtracting fractions is a bit of a misnomer, as
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```
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(a/b) - (c/d) = (a/b) + (-c/d),
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```
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so there is nothing special going on here, it is just the usual [addition](https://github.com/freeCodeCamp/freeCodeCamp/blob/master/guide/english/mathematics/adding-fractions/index.md) of fractions. Namely,
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```
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(a/b) - (c/d) = (a/b) + (-c/d) = (a*d - b*c)/(d*b).
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```
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For example,
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```
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1/7 - 3/8 = (1*8 - 7*3)/(7*8) = -13/56.
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```
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