Irene R. answered 01/28/20
Senior Mechanical Engineer with 13+ years of Teaching Experience
To determine how many bottles Lisa collected, you would multiply 1 2/3 by 1 1/2.
First convert both mixed numbers to improper fractions; 1 2/3 = 5/3 AND 1/ 1/2 = 3/2
Then 5/3 * 3/2 = 15/6 OR 5/2
Also 5/3 is equivalent to 2 1/2
Lisa collected 2 and 1/2 bottles.