The width of the rectangle is 8 m and is 4/5 of its length, find 3/20 of the area of the rectangle.

To solve this problem, recall the formula for the area of ​​a rectangle. The area of ​​a rectangle is equal to the product of its length and width. S = a * b, where a is the length and b is the width. Knowing that the width is 8 meters, which is 4/5 of its length, we calculate what the length is. To find a number based on its fractional part, you need to divide this number by a fraction.
8: 4/5 = 8 * 5/4 = 40/4 = 10 meters.
Let’s calculate the area of ​​the rectangle.
S = a * b = 10 * 8 = 80 square meters.
Let’s calculate what is equal to 3/20 of the area. In order to find a part of a number, you need to multiply this number by a part.
3/20 * 80 = 3 * 4 = 12 m ^ 2.
Answer: 12 m ^ 2.