Unit Rate is the ratio of two measurements in which the second term is 1.
The two measurements involved for which ratio are taken in unit rate is always different.
If Nancy earns $180 in 20 hours, then unit rate of her earning is given as 180/20 = $9 per hour.
A. 16 toys/hour
B. 15 toys/hour
C. 14 toys/hour
D. 13 toys/hour
Correct Answer: B
Step 1: Unit rate is a ratio of different units of measurement with the second term being equal to 1.
Step 2: So, Unit Rate = toys/hours =60/40
Step 3: = [Divide both the numerator and the denominator by the denominator.]
Step 4: =15/1 = 15 [Simplify.]
Step 5: So, William can pack 15 toys/hour.