math help

What is 97/75 + 8/10?

What is 97/75 + 8/10?

Let's add

97
75
+
8
10

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 97 by 10, and get 970, then we multiply 75 by 10 and get 750.

97/75 times 10

Do the same for the second term. We multiply 8 by 75, and get 600, then multiply 75 by 10 and get 750.

8/10 times 75

The problem now has new fractions to add:

970
750
+
600
750

Step 2

Since our denominators match, we can add the numerators.

970 + 600 = 1570

The sum we get is

1570
750

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:

1570
750
÷ 2 =
785
375

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:

785
375
÷ 5 =
157
75

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...

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...

Nope. Try the next prime number, 47...

Nope. Try the next prime number, 53...

Nope. Try the next prime number, 59...

Nope. Try the next prime number, 61...

Nope. Try the next prime number, 67...

Nope. Try the next prime number, 71...

Nope. Try the next prime number, 73...

Nope. Try the next prime number, 79...

No good. 79 is larger than 75. So we're done reducing.

Congratulations! Here's your final answer to 97/75 + 8/10

97
75
+
8
10
=
157
75
© 2014 Randy Tayler