math help

What is 97/75 + 2/10?

What is 97/75 + 2/10?

This is how you add

97
75
+
2
10

Step 1

We can't add two fractions with different denominators (the bottom number). So you need to get a common denominator - both bottom numbers need to match. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we 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 2 by 75, and get 150, then multiply 75 by 10 and get 750.

2/10 times 75

So now our fractions look like this:

970
750
+
150
750

Step 2

Since our denominators match, we can add the numerators.

970 + 150 = 1120

So the answer is:

1120
750

Step 3

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

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:

1120
750
÷ 2 =
560
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:

560
375
÷ 5 =
112
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 + 2/10

97
75
+
2
10
=
112
75
© 2014 Randy Tayler