subtract.

-2/5 - 7/10=

I got the answer of 5/10 = 1/2
is this correct?

4 answers

no. You are not changing fractions...

-2/5=-4/10

-4/10 -7/10=?
http://www.mathsisfun.com/fractions_addition.html
-3/10 or just 3/10 ok that is what I am not doing correctly I am not changing the fraction nor changing to common denominators... ok thank you
it is -11/10. Why? Think on that.

You are not changing fractions to have common denominators. See the link I gave you.