A CHEF THINKS THAT 2 OUT OF EVERY 5 DINNER GUEST WILL ORDER SOUP. HE EXPECTS 800 GUESTS. USE EQUIVALENT RATIOS TO ESTIMATE HOW MANY CUPS OF SOUP HE SHOULD PREPARE
If the Chef expects 800 total guests, you divide 800 by 5, and then multiply that answer by 2, because he expects that every 2 out of 5 people will order the soup.