!!!!WHAT I LEARNT IN MATHS!!!!

This week in maths I learnt how to write three ways of a ratio.
For example:
6:7,6 to 7 and 6/7..... 
I learnt how to use two strategies to solve ratio.
Number 1:
2:1 : 10:?
I look at the relationship between 2 and 1. I know that if I divide 2 into 2 groups I get 1. After that I look at 10 and see if I divide 10 into 2 groups I get 2 groups of 5. So it will be 2:1 : 10:5.

Number 2
5:1 : 40:?
Like the first one but instead of looking at the relationship between 5:1 I look at the relationship between 5 and 40. I know that 5x8=40 so I do 1x8=8 and that is my answer. 5:1 : 40:8.