Idon't want the answer, i want to know how to do it. what is the ratio of 4/5 to 7/15?

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates