What's the sum of 2⁄5 and 2⁄4?

a. 8⁄20
b. 6⁄7
c. 10⁄20
d. 9⁄10

This is a sum of fractions with different denominators.

You can solve them by transforming to fractions with the same denominator.

If you multiply the fraction 2/5 by 2/2 and the simpliy the fraction 2/4 to 1/2 and then multiply it by 5/5 you get:

2/ 5 * 2/2 = 4 / 10

2/4 = 1/2 * 5/5 = 5 / 10

Now you have two fractions with equal denominator which you can sum directly:

4/10 + 5/10 = 9/10

option D. 9/10