Exercise 3 Page 723

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators. 16/25 + 3/10 To find the smallest common denominator we should rewrite the denominators of both fractions using only prime numbers. 25 = 5* 5 10 = 2* 5 Now, in order to get a common denominator we need to multiply each fraction by factors that appear only in the denominator of the other fraction. Therefore, we multiply 1625 by 2 and 310 by 5.

16/25+3/10

ExpandFrac

a/b=a * 2/b * 2

16* 2/25* 2+3/10

ExpandFrac

a/b=a * 5/b * 5

16* 2/25* 2+3* 5/10* 5

Multiply

Multiply

32/50+15/50

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

32/50+15/50

AddFrac

Add fractions

32+15/50

AddTerms

Add terms

47/50