what is the sum of 2/5 and 2/4?

2/5+2/4
2/5+1/2
4/10+5/10
9/10 or .9

2/5 = 8/20
2/4 = 10/20=

18/20 or 9/10

2 5 2 4

2/5 + 2/4
(get the least common denominator=20)
= 8/20 + 10/20
(divide 20 by the denominators and then multiply the quotient to the numerator)
=18/20 = 9/10
=.9

2/5 + 2/4
= 2x4 / 5x4 + 2x5 /4x5
= 8/20 + 10/20
= 18/20
= 18÷2 / 20÷2
= 9/10

2(4)/5(4) = 8/20
2(5)/4(5) = 10/20=

10/20+8/20 =18/20 or 9/10 = .9

find the Lowest Common Denominator and proceed as follows:

(2/5) + (2/4) = (8/20) + (10/20) = 18/20

Simplify: 9/10

You have to convert the denominators to the lowest common number before you can add fractions. In this case, it's 10, since 2/4 is 1/2 and the lowest common denominator of 2 and 5 is 10. The answer is 4/10 + 5/10 = 9/10.

find a common denominator

5x4 = 20 so this could work as a common denominator

write 2/5 in terms of something/20 and write 2/4 as something/20

2/5 = x/20 x= 8
2/4 = x/20 x= 10

now we have,
8/20 plus 10/20 which would be 8+10/20, which is 18/20. In reduced form, it is 9/10.

LCM of 5 and 4 = 20

4x2 = 8
5x2 = 10

8+10 = 18

Answer = 18/20 = 0.9 or 9/10