Question

Split 108 in the ratio 1:3
Split 24 in the ratio 3:5
Split 65 in the ratio 4:9

Answer 1

All you need to do is add up the ratios.
Divide it by the total to find 1.
Then multiply it to be able to find out the exact ratio.
1) 27:81
2) 9:15
3) 20:45
If you add it all up you should get the total you started with that you wanted to split.
Hope this helped and gets you your mark