Answer:
c : g : t = 10 : 15 : 12
Explanation:
c: g = 2 : 3
g : t = 5 : 4
We need the number corresponding to g to be equal in both ratios.
Multiply the numbers in the first ratio by 5. Multiply the numbers in the second ratio by 3.
c : g = 10 : 15
g : t = 15 : 12
c : g : t = 10 : 15 : 12