Ben has a bag of marbles. 4 are blue, 11 are red, and 5 are black. What percent of the marbles
is black?
Step 1: Find the total # of marbles
Step 2: How many are black? Set up a ratio that shows this part/whole relationship
Step 3: Set this equal to x/100
Step 4: Solve for x
25%
Ob
Ос
12%
30%