Respuesta :
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
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