Each tricycle has 3 wheels and one seat, so the ratio of seats to wheels is 1:3
How many times does 12 go into 60?
5 times.
What is 100/5?
20
So, 20%.
You could also just divide 12/60 then get .2 and then realize that it is the same as .20 and that is the same as 20%.
Just use teh same numbers as the perimeter and times it by 7 and 5
