multiply the number in front of the fraction on the mixed number by the denominator and add that to the numerator to convert it to an improper fraction, then add
For example:
If you want to subtract 3/4 from 10 2/3, you have to first convert the 10 2/3 to an improper fraction, which would be 32/3. Next you have to find the common denominator for both fractions. 3 x 4 = 12, so 12 is the lowest common denominator; therefore, 3/4 = 9/12 and 32/3 = 128/12.
Now you can perform the operation:
128/12 - 9/12 = 117/12; convert 117/12 to a mixed number by dividing 117 by 12, which is 9 with a remainder of 9; 117/12 becomes 9 9/12 or 9 3/4.
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To add or subtract mixed numbers, first convert them to improper fractions. Then, perform the addition or subtraction operation on the numerators while keeping the denominators the same. Next, simplify the resulting fraction if possible by reducing it to lowest terms. Finally, if needed, convert the improper fraction back to a mixed number for the final answer.
Change them into mixed numbers and add the integers and fractions together ensuring that the fractions have a common denominator.
You need common denominators. Then add or subtract the numerators. If the answer is an improper fraction it is common practice to reduce it to a mixed number.