A ratio compares two quantities.
How may days are in May? 31
How many days in a year? 365
Now, we are being asked to compare may to a year.
Answer: 31 to 365
Now, the other is easy also.
A triangle has 3 sides, and a square has 4.
Answer: 3 to 4
Find equal ratio's
8/12 = 2/3 = 4/6 = 16/24
20/25 = 4/5 = 40/50 = 80/100
Done! Enjoy! :) I hope I helped your son. Take care.