Answer: 77/6 or 12 5/6
Explanation:
To solve this subtraction problem, we need to first convert the mixed numbers to improper fractions.
20 1/3 can be written as:
20 + 1/3 = 60/3 + 1/3 = 61/3
7 1/2 can be written as:
7 + 1/2 = 14/2 + 1/2 = 15/2
So, the problem becomes:
61/3 - 15/2
To subtract two fractions, we need to have a common denominator. The smallest number that both 3 and 2 divide into is 6. So we will convert both fractions to have a denominator of 6.
61/3 = (61/3) * (2/2) = 122/6
15/2 = (15/2) * (3/3) = 45/6
Now we can subtract the two fractions:
122/6 - 45/6 = 77/6
So, the final answer is:
20 1/3 - 7 1/2 = 77/6 or 12 5/6 (as a mixed number)