Answer:
27/10
Explanation:
You want to get a common denominator in order to add them together.
First:
Convert the whole numbers to fractions, 4 = 8/2
4 1/2 = 9/2
And 1 = 10/10
1 8/10 = 18/10
Then find the common denominator:
The least common multiple of 2 and 10 is 10. So:
convert 9/2 to a denominator of 10 : 9*5 / 2*5 = 45/10
Subtract:
45/10 - 18/10 = 27/10