Answer:
a:c = 1:3
a:b:c = 1:2:3
Explanation:
This is actually a very easy question! We just have to break the numbers up and make a sort of graph I guess? Since a:b equals 1:2, this means that a equals 1 and b equals 2. Since b:c equals 2:3 this means that c is equal to 3 and we already know that b is equal to 2.
Chart/Graph:
a = 1
b= 2
c = 3
(We use this chart to identify a:c and a:b:c)