The width of the rectangle is 0.8 cm and is 25% of its length. Find the area of the rectangle.

The first step is to present the percentages as a decimal fraction. To do this, divide the number of percent by one hundred.

25% = 25/100 = ¼.

Let’s calculate what the length of the rectangle is, knowing that the ¼ part of it is 0.8 cm. To find the number by its part, we must divide the number that expresses this part by a fraction.

0.8 / 0.25 = 3.2 cm.

Let’s calculate the value of the area of a rectangle 3.2 cm long and 0.8 cm wide. The area of a rectangle is equal to the product of length and width.

S = 3.2 * 0.8 = 2.56 cm².

Answer: 2.56 cm².