C/d=0,3 d/c=? b/a=3 a/b=?

Question

C/d=0,3
d/c=?

b/a=3
a/b=?

Answer 1

C/d=0,3⇒ d/c=1/0,3
b/a=3⇒ a/b=1/3

Answer 2

Д\с = 1 \0.3 = 10\3
а\в = 1\3