math help

What is 16/48 + 1/9?

What is 16/48 + 1/9?

Here's how we add

16
48
+
1
9

Step 1

Of course, you can't add two fractions if the denominators (bottom numbers) don't match. To get a common denominator, multiply the denominators together. Then we fix the numerators by multiplying each one by their other term's denominator.

Now you multiply 16 by 9, and get 144, then we multiply 48 by 9 and get 432.

16/48 times 9

Do the same for the second term. We multiply 1 by 48, and get 48, then multiply 48 by 9 and get 432.

1/9 times 48

The problem now has new fractions to add:

144
432
+
48
432

Step 2

Since our denominators match, we can add the numerators.

144 + 48 = 192

This yields the answer

192
432

Step 3

The last step is to reduce the fraction if we can.

To find out, we try dividing it by 2...

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

192
432
÷ 2 =
96
216

So far so good... let's try to divide by that number again.

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

96
216
÷ 2 =
48
108

So far so good... let's try to divide by that number again.

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

48
108
÷ 2 =
24
54

So far so good... let's try to divide by that number again.

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

24
54
÷ 2 =
12
27

So far so good... let's try to divide by that number again.

No good. So next you try the next prime number, which is 3...

Are both the numerator and the denominator evenly divisible by 3? Yes! So we reduce it:

12
27
÷ 3 =
4
9

So far so good... let's try to divide by that number again.

No good. So next you try the next prime number, which is 5...

No good. 5 is larger than 4. So we're done reducing.

And we're done! Here's the final answer to 16/48 + 1/9

16
48
+
1
9
=
4
9
© 2014 Randy Tayler