Exercise 3 Page 661

To subtract fractions, they need to have the same denominator.

-73/120

Practice makes perfect

To subtract fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators. 7/24-9/10In this case, the least common denominator is 120. Let's rewrite our expression so that both fractions have a denominator of 120. To do this, we will multiply the numerator and denominator in the first fraction by 5. After that, we will multiply the numerator and denominator in the second fraction by 12.

7/24-9/10

ExpandFrac

a/b=a * 5/b * 5

7 * 5/24 * 5-9/10

ExpandFrac

a/b=a * 12/b * 12

7 * 5/24 * 5-9 * 12/10 * 12

Multiply

35/120-108/120

Now that we have a common denominator, we can proceed to simplify the expression.

35/120-108/120

SubFrac