Exercise 23 Page 297

When adding or subtracting fractions, they should have the same denominator. In this exercise, we are given two fractions with different denominators. - 7/8 + 1/3 To add fractions, their denominators need to be the same. Since 24 is the least common denominator of the two fractions, we can multiply both the numerator and denominator of - 78 by 3 and 13 by 8 to create a common denominator. We will start with the first fraction.

- 7/8

ExpandFrac

a/b=a * 3/b * 3

- 7* 3/8* 3

Multiply

Multiply

- 21/24

Let's continue with the second fraction.

1/3

ExpandFrac

a/b=a * 8/b * 8

1*8/3*8

Multiply

Multiply

8/24

Now, since the denominators are the same, we can subtract the fractions.

- 21/24+8/24

MoveNegFracToNum

Put minus sign in numerator

-21/24+8/24

AddFrac

Add fractions

-21+8/24

AddTerms

Add terms

-13/24