The side of the rectangle is 3 9/10 cm, the second side is 2 3/5 times smaller. Find the perimeter and area.

It is known that the second side of the rectangle is 2 3/5 times smaller than the first, we find it by dividing the first side by 2 3/5:

(3 9/10): (2 3/5) = 3.9: 2.6 = 1.5 cm;

The perimeter of a rectangle is equal to the sum of all its sides, or the sum of its length and width, multiplied by 2:

(3.9 + 1.5) * 2 = 10.8 cm;

The area of a rectangle is equal to the product of its length and width:

3.9 * 1.5 = 5.85 cm2.