What 2/5=? equivalent fraction

Just multiply top and bottom by same number

if we multiply by 2/2 then we get 4/10

if we multiply by 3/3 then we get 6/15

if we multiply by 4/4 then we get 8/20

some ones are

4/10

6/15

8/20

10/25

12/40

14/35

18/40

18/45

20/50

You could double it to 4/10 or 6/15