math help

What is 100/24 + 2/7?

What is 100/24 + 2/7?

Here's how to add

100
24
+
2
7

Step 1

We still have different denominators (bottom numbers), though, so we need to get a common denominator. This will make the bottom numbers match. Multiply the denominators together first. Now, multiply each numerator by the other term's denominator.

Now we multiply 100 by 7, and get 700, then we multiply 24 by 7 and get 168.

100/24 times 7

Now for the second term. You multiply 2 by 24, and get 48, then multiply 24 by 7 and get 168.

2/7 times 24

This gives us a new problem that looks like so:

700
168
+
48
168

Step 2

Since our denominators match, we can add the numerators.

700 + 48 = 748

So what's the answer so far?

748
168

Step 3

Can this fraction be reduced?

First, we attempt to divide it by 2...

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

748
168
÷ 2 =
374
84

Now, try the same number again.

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

374
84
÷ 2 =
187
42

Now, try the same number again.

Nope. Try the next prime number, 3...

Nope. Try the next prime number, 5...

Nope. Try the next prime number, 7...

Nope. Try the next prime number, 11...

Nope. Try the next prime number, 13...

Nope. Try the next prime number, 17...

Nope. Try the next prime number, 19...

Nope. Try the next prime number, 23...

Nope. Try the next prime number, 29...

Nope. Try the next prime number, 31...

Nope. Try the next prime number, 37...

Nope. Try the next prime number, 41...

Nope. Try the next prime number, 43...

No good. 43 is larger than 42. So we're done reducing.

Congratulations! Here's your final answer to 100/24 + 2/7

100
24
+
2
7
=
187
42
© 2014 Randy Tayler