add the following

- 4/7 + [ -7/20]

7*20= 140
so -60/140 + - 49/140= 11/140?

2 answers

I have no idea what you did.

-4/7 -7/20

common denominator: 140

(-80-49)/140=-129/140
thank you

I see my error

I multiplied 4 *20 and instead of writing 80 I wrote 60, which threw off the rest of the equation. Thanks