a.1 per 3= 3 per...=....per 15

[tex] \frac{1}{3}= \frac{1\times3}{3\times3} =\frac{3}{9} \\ \frac{1}{3}= \frac{1\times5}{3\times5} = \frac{5}{15} [/tex]

Maka, [tex] \frac{1}{3}= \frac{3}{9}= \frac{5}{15} [/tex]

Mapel : Matematika
Kelas : III SD
Bab : Pecahan

Pembahasan :
1/3 = (1 x 3)/(3 x 3) = 3/9
1/3 = (1 x 5)/(3 x 5) = 5/15

Maka...
1/3 = 3/9 = 5/15