Question

When the price of Milk is $5 per gallon consumers demand 1,000 boxes of Boo Berry Cereal. When the price of milk increases to $5.50 per gallon consumers demand 700 boxes of Boo Berry Cereal.
Required:
a. What is the percentage change in the price of milk?
b. What is the percentage change in the quantity demanded for Boo Berry Cereal?

Answer 1

Answer: a. 10%

b. -30%

Explanation:

a. What is the percentage change in the price of milk?

Old price = $5.00

New price = $5.50

Percentage change = ($5.50 - $5.00)/$5.00 × 100

= 0.50/5.00 × 100

= 1/10 × 100

= 10%

Percentage change on price = 10%

b. What is the percentage change in the quantity demanded for Boo Berry Cereal?

Old quantity = 1000

New quantity = 700

Percentage change = (700 - 1000)/1000 × 100

= -300/1000 × 100

= -30%

The percentage change in the quantity demanded for Boo Berry Cereal is -30%.