I am confused what is your question then i will tell you the answer.
Answer:
4/5
Step-by-step explanation:
start with putting the decimal over ten
8/10
than divide numerator and denominator with the common denominator 2
8÷2=4 10÷2=5
4/5
The third one because it says 4 of 7 and the rest which is 3 eat a school meal
So the ratio is 4:3