Answer:
3:7
Step-by-step explanation:
18/6(largest factor)=3
42/6(largest factor)=7
3/7
18 ÷ 2 9 ÷ 3 3
---- = ----- = ----
42 ÷ 2 21 ÷ 3 7
1/5 x X = 13
x5 x5
x = 65 in total