Tolong di jawab kak besok hrus di kumpulin pr nya...mksh ya kak.....39/63 = n/21 berapa nilai n?

[tex] \frac{39}{63} = \frac{n}{21} \\ \frac{39}{63} \times 21 = n \\ \frac{39}{3} = n \\ 13 = n[/tex]

FPB=3
39/63 : 3/3 = 13/12
jawabannya 13
(maaf jika ada yg salah)