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They are a common factor and any common factor in the numerator and denominator of a ratio can be cancelled out.

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7y ago
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Q: Why do the fours in the numerator and denominator cancel out?
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Related questions

When can you simplify a fraction or a rational algebraic expression?

When the denominator is a factor of the numerator. If there is 2x in the numerator and denominator these terms cancel.


How do you cancel units of measurements?

If one unit is in the numerator and one unit is in the denominator then they can cancel out.


How can you cancel down fractions?

By dividing the numerator and denominator by their HCF


Can you cancel a numerator from 1 term and a denominator from the other?

No, you must always do the same thing to both sides of an equation or to the numerator and the denominator


When are you able to cross cancel a fraction?

When the numerator and denominator are not co-prime.


How are rational numbers multiplied?

The simple way: multiply the numerators to get the numerator, multiply the denominators to get the denominator. To get the preferred answer cancel common factors in the new numerator and denominator. But this can be tricky.


How do you know which units of a conversion factor must be in the denominator?

The denominator must contain the unit that you wish to cancel in the numerator of the other number.


How do you write the Simplest form of fractions?

Factor the numerator and denominator, and then cancel any common factors.


What is 18 over 56 in simple form?

Fractions can be simplified when the numerator and denominator have a common factor in them. If both the numerator and denominator have common factors, then we can cancel these factors out. So the simplest for of 18/56 is 9/28.


What is 3a divided by 1a?

3


Has a numerator and denominator?

A fraction has a numerator and a denominator.


What do you divide first numerator or denominator?

you switch the numerator with the denominator then multiply the numerator first then the denominator.