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To cancel down a fraction you need to factorise both the numerator and the denominator. of your fraction. There are different ways of factorising numbers, you can break each. number down into their prime factors (see study guide: Prime Factors), you can find the.
Once your child fully understands how improper fractions work, you can teach him or her how to quickly convert a mixed number into an improper fraction. Do this by multiplying the denominator by the whole. Add the product to the numerator. For example, if you want to convert the mixed number 3 4/9 into an improper fraction, first multiply the denominator 9 by the whole, 3. Since 9x3=27, you should then add 27 to the numerator, 4. Place the answer, 31, over the original denominator. Therefore, 3 4/9 written as an improper fraction is 31/9.