Rewrite addition equation with whole number and fraction part separated

3 +

3

9

+ 9 +

3

7

Solve the whole number parts

3 + 9 = 12

Now, solve the fraction parts

3

9

+

3

7

Least Common Denominator (LCD) of 9 and 7 is 63.

Now, we have to make sure both fractions have the same new denominator 63.

You can write fraction

3

9

as

3x7

9x7

=

21

63

You can write fraction

3

7

as

3x9

7x9

=

27

63

Now, both fractions have same denominator and we are ready to add

21

63

+

27

63

=

21+27

63

=

48

63

That can be simplified to

=

16

21

Combine whole numbers and fraction parts

12 +

16

21

= 12

16

21