The length of the rectangle is 8 cm, the width is three-fourths of the length

The length of the rectangle is 8 cm, the width is three-fourths of the length. We painted over 30% of its area. What area of the rectangle is left unpainted?

Let’s find the width of the rectangle. To do this, divide the length by 4 and multiply by 3.

8: 4 * 3 = 6 (cm) – the width of the rectangle.

Find the area of the rectangle. To do this, we multiply the length by the width.

8 * 6 = 48 (cm2) – the area of the rectangle.

Find the filled one. To do this, divide the area of the rectangle by 100 and multiply by 30.

48: 100 * 30 = 14.4 (cm2) – the filled area of the rectangle.

Let’s find which part is not painted over.

48 – 14.4 = 33.6 (cm2) – left is not painted over.

Answer: 33.6 square centimeters.