Subtract these fractions with unlike denominators: 6/7 - 2/5

First 6/7 and 2/5 have to have the same denominator so find a common multiple

7 14 21 28 35 42 49

5 10 15 20 25 30 35

7 and 5 both share 35

So then multiple 6/7 x 5/5

6 x 5 = 30  and 7 x 5 = 35  30/35

2/5 x 7/7

2 x 7 = 14 and 5x 7=35    

14 /35

Then subtract

30/35 - 14 /35

30-14 = 16

So your answer is 16/35

16/35

Step-by-step explanation:

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 6 by 5, and get 30.

Then we multiply 2 by 7, and get 14.

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

So now our fractions look like this:

30/35 −14/35

Since our denominators match, we can subtract the numerators.

30 − 14 = 16

So the answer is:

16/35

hope this helps

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hope this ! have a great day.

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step-by-step explanation: