Write an article based on this "Change the mixed numbers into improper fractions Find a common denominator if necessary. Make equivalent fractions if you have to change the denominators. Adjust all of the fractions in the problem to make them equivalent. Subtract the numerators and keep the denominator the same. Simplify the answer."
. Mixed numbers are whole numbers with fractions. To make it easier to subtract, turn the whole numbers into fractions. This will mean that the numerator will be larger than the denominator. For example, 2 3/4 - 1 1/7 will become 11/4 - 8/7. Find the lowest common multiple of both denominators so you can make a like denominator for the fractions. For example, if you're doing 11/4 - 8/7, list all the multiples of 4 and 7 to find 28. Since the multiples of 4 include 4, 8, 12, 16, 20, 24, 28 and the multiples of 7 include 7, 14, 21, and 28, 28 is the lowest number they have in common. You'll need to make denominators become the lowest common multiple. To do this, multiply the entire fraction. For example, to make the denominator for 11/4 become 28, multiply the fraction by 7. The fraction will become 77/28. If you've changed the denominator for 1 of the fractions in your problem, you'll need to adjust the other fractions so their ratios are still equal to the original problem. For example, if you've adjusted 11/4 to become 77/28, multiply the 8/7 by 4 to get 32/28. The problem 11/4 - 8/7 becomes 77/28 - 32/28. If the denominators were the same to begin with or you've made equivalent fractions, you can now subtract the numerators. Write the answer and place it over the denominator. Remember not to subtract the denominator. For example, 77/28 - 32/28 = 45/28. You'll probably need to change the answer into a mixed number. Start by dividing the numerator by the denominator to get a whole number. Then write how many parts you have left. This number will be the numerator. Place the numerator over the same denominator. Reduce this fraction if you can. For example, 45/28 becomes 1 17/28 because 28 goes into 45 1 time and has 17 parts of 28 left over.