The length of the rectangle is 18 cm and the width is 60% of its length, the perimeter and area of the rectangle were calculated.

1) Find the width of the rectangle. To find 60% of the number, you need to convert the percentage to a decimal fraction. 60% = 0.6. Then multiply this number by a fraction.

18 * 0.6 = 10.8 (cm)

2) Find the perimeter of the rectangle. The perimeter of a rectangle is equal to the sum of the lengths of all four of its sides. P = 2 (a + b).

P = 2 (18 + 10.8) = 2 * 28.8 = 57.6 (cm)

3) Find the area of the rectangle. The area of a rectangle is equal to the product of its sides. S = a * b.

S = 18 * 10.8 = 194.4 (cm ^ 2)

Answer. 57.6 cm; 194.4 cm ^ 2.