I need to simplify (2/5+1/5) - 3/10

3/5 - 3/10

6 - 3 / 10

3 / 10

I think is

First you always need to solve the parenthesis first, so we have to solve 2/5 + 1/5, which is 3/5

3/5 - 3/10

In order to subtract fractions with different denominators, we have to make them equal:

3/5 is equal to 6/10 which is (3*2) / (5*2) making 3/5 equivelnt to 6/10

so now our equation is 6/10 - 3/10

In order to subtract fraction that have the same denominators, you just need to subtract the numerators and leave the denominators alone:

6/10-3/10 = 3/10

The awnser is 3/10

I hope you understood my brief explanation