we are given the sum of the following fractions:

To sum these fractions we may multiply the numerator and denominator of the second fraction by 5, like this:

Since now they have the same denominator we can add the numerators and leave the same denominator, like this:

Now we can simplify the resulting fraction by dividing the numerator and denominator by 2:

Therefore, the sum of the two fractions is 3/5