Whenever you are solving an equation, you have to do the part that is inside the parenthesis first. So in this case, you have to add 2/5 and 1/5. That, of course, gets you 3/5. You can just add the top parts of the fraction together as long as the bottom parts are the same.
So now the equation is simply 1-3/5. Of course, 1 is equal to 5/5. So you can write this as 5/5-3/5. Again, you can simply subtract the top parts of the fractions as long as the bottom parts are the same.
That comes out to 2/5, which is the answer to this question as a whole.
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