Question

2/3+-5/7 solve the following​

Answer 1

Answer:

1.28or9/7

Step-by-step explanation:

2/3+(-5/7)

take L. C. M.

14/7-5/7

9/7=1.28

Answer 2

Answer: -1/21

Step-by-step explanation: we must make these fractions have the same denominator (the bottom number/ the number you are dividing with.)

the way we do this is we times the denominator of one fraction by the denominator and numerator (the top number/the number that is being divided into.) We then do the same with the other fraction.

So 3 times -5 is -15 as a negative times a positive always becomes more negative. 3 times 7 = 21, so -15/21 is one of the fractions. Now we must do the same but with the other fraction.

So 7 x 3 = 21, and 7 x 2 = 14, so 14/21.

Now we can add the fractions, 14/21 + -15/21, remember, a positive plus a negative will become more negative, so 14 + -15 will become -1, as you are going up on the number ladder. The denominator stays the same.

So your answer is -1/21

Hope this helps.