Question

How do you evaluate `2/5 + 3/10`?

Answer 1

Convert the fractions so they have a common denominator; then add the numerators to get `7/10`

Explanation:

Given
`color(white)("XXX")2/5+3/10`

To add fractions we need to write them with the same denominator:
and since `2/5=4/10`

`color(white)("XXX")2/5+3/10 = 4/10+3/10`

When fractions have the same denominator we can add the numerators and write the sum over that common denominator:
`color(white)("XXX")4/10+3/10=(4+3)/10=7/10`