aplique a propriedade Fundamental e assinale as proporções

c)7/2 = 6/21
d)18/30 = 3/5
e)15/8 = 5/6
f)9/7 = 81/63
g)7/3 = 12/28
h)24/30 = 12/15
i)35/24 = 7/3
j)4/9 = 20/45
k) 14/6 = 21/9
l)21/20 = 44/40
m) 20/30 = 2/3
n)20/25 = 12/15
o)45/25 = 90/50​