math help

What is 64/16 + 10/12?

What is 64/16 + 10/12?

Here's how we add

64
16
+
10
12

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 64 by 12, and get 768, then we multiply 16 by 12 and get 192.

64/16 times 12

Do the same for the second term. We multiply 10 by 16, and get 160, then multiply 16 by 12 and get 192.

10/12 times 16

The problem now has new fractions to add:

768
192
+
160
192

Step 2

Since our denominators match, we can add the numerators.

768 + 160 = 928

The sum we get is

928
192

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:

928
192
÷ 2 =
464
96

Let's try dividing by that again...

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

464
96
÷ 2 =
232
48

Let's try dividing by that again...

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

232
48
÷ 2 =
116
24

Let's try dividing by that again...

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

116
24
÷ 2 =
58
12

Let's try dividing by that again...

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

58
12
÷ 2 =
29
6

Let's try dividing by that again...

Nope! So now we try the next greatest prime number, 3...

Nope! So now we try the next greatest prime number, 5...

Nope! So now we try the next greatest prime number, 7...

No good. 7 is larger than 6. So we're done reducing.

There you have it! Here's the final answer to 64/16 + 10/12

64
16
+
10
12
=
29
6
© 2014 Randy Tayler

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