Question

A rectangular piece of paper has side lengths of 30 cm and 25 cm.

Jasmin cuts the paper to make a new rectangle. The side lengths of the
new rectangle are 20% shorter than the side lengths of the original piece
of paper.
What is the area of the new rectangle?
Give your answer in cm².

Answer 1

480 cm^2

Explanation:

20% of 30 = 6 30 - 6 = 24

20% of 25 = 5 25 - 5 = 20

area = length * width

20 * 24 = 480 cm^2

Answer 2

480 cm²

Explanation:

New side lengths:

80% of 30 cm = 0.8% × 30 cm = 24 cm

80% of 25 cm = 0.8 × 25 cm = 20 cm

area = length × width

area = 24 cm × 20 cm

area = 480 cm²