If the quotient of number a divided by number B is 0.8, then the ratio of number a to number B is (): (), number a is of number B (), number a is less than number B (), number B is more than number a () If the ratio of the diameter of the big circle to the diameter of the small circle is 3, then the ratio of the circumference of the big circle to the circumference of the small circle is (): (), and the ratio of the area is (): ()

If the quotient of number a divided by number B is 0.8, then the ratio of number a to number B is (): (), number a is of number B (), number a is less than number B (), number B is more than number a () If the ratio of the diameter of the big circle to the diameter of the small circle is 3, then the ratio of the circumference of the big circle to the circumference of the small circle is (): (), and the ratio of the area is (): ()

If the quotient of a divided by B is 0.8, then the ratio of a to B is (5): (4)
A: B = 0.8:1 = 5:4
The number of a is 80% of the number of B, and the number of a is 1 / 5 less than that of B,
A is less than B: (5-4) △ 5 = 1 / 5
Number B is more than number a (1 / 4)
(5-4) △ 4 = 1 / 4