math help

What is 100/50 + 5/11?

What is 100/50 + 5/11?

Here's how you add

100
50
+
5
11

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 100 by 11, and get 1100, then we multiply 50 by 11 and get 550.

100/50 times 11

Do the same for the second term. We multiply 5 by 50, and get 250, then multiply 50 by 11 and get 550.

5/11 times 50

The problem now has new fractions to add:

1100
550
+
250
550

Step 2

Since our denominators match, we can add the numerators.

1100 + 250 = 1350

The sum we get is

1350
550

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:

1350
550
÷ 2 =
675
275

Now, try the same number again.

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

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

Are both the numerator and the denominator evenly divisible by 5? Yes! So we reduce it:

675
275
÷ 5 =
135
55

Now, try the same number again.

Are both the numerator and the denominator evenly divisible by 5? Yes! So we reduce it:

135
55
÷ 5 =
27
11

Now, try the same number again.

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

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

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

No good. 13 is larger than 11. So we're done reducing.

Congratulations! Here's your final answer to 100/50 + 5/11

100
50
+
5
11
=
27
11
© 2014 Randy Tayler