Question

Find 3/7 of 1/5 please helppppppopp

Answer 1

8/35

Explanation:

Step 1

We can't subtract two fractions with different denominators. So you need to get a common denominator. 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 3 by 5, and get 15.

Then we multiply 1 by 7, and get 7.

Next we give both terms new denominators -- 7 × 5 = 35.

So now our fractions look like this:

15

35

−

7

35

Step 2

Since our denominators match, we can subtract the numerators.

15 − 7 = 8

So the answer is:

8

35

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...

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...

Nope! So now we try the next greatest prime number, 11...

No good. 11 is larger than 8. So we're done reducing.

There you have it! The final answer is:

3/7

−

1/5

=

8/35

Answer 2

eight over thirty- five, 8

35

Explanation:

In order to subtract the fractions you have to do a simple mathematics step I learned in sixth grade and I still use it now, i'm in ninth grade.

So the tactic I learned in middle school was, keep change flip.

1- Take the three over the seven: 3

7

(Second part of step one)1- Then you do the same to the one and five: 1

5

2- When you subtract a fraction you cannot do it with different denominators. Therefor you have to find the same number in both of the numerator or denominator.(Across from each other)

So multiply the different denominator by each other: 3 x 5= 15

Then you do it with the one and the seven: 1 x 7= 7

Then next you give both the denominators new fractions

This is what they would look like now

15 - 7

35 35

Since the denominators match now you can subtract the numerators.

4- 15- 7= 8

So the answer for this step is now 8 over 35.

3- The last step you have to simplify the fraction. The fraction can sometimes be reduced to smaller parts. ( like 1 over 2 was simplified by 2 over 4 and so on and so on) So first you need to divide it by 2, at least try. Since you can't do that you try the next biggest prime number, 3. And you cannot do that so that moves us on to the next prime number, 5 you cannot. There are both the prime numbers, 7 and 11 but that will not work because seven can't do anything but give you a decimal and 11 is far to greater for the fraction. So you would go for the prime number in between 7 and 9, 8.

Your answer will be fount at the top.