4: (2 and two thirds (8/3))= 18: 12

5: (25/3 (8 and 1)) = 3: 5.

2. The school bought *** 168 basketball and football, and the ratio of basketball to football was 5: 3. How many basketball and football did you buy?

Solution: There are 168 ÷ (5+3) × 5 = 105 basketballs bought.

Then the football you buy is 168 ÷ (5+3) × 3 = 63 (pieces).

There are/kloc-0.05 basketballs and 63 footballs.

Generally, the mass of water with the same volume is 25% greater than that of alcohol. There is a bucket of water with a mass of 25 kilograms. If the volume of a barrel of alcohol is the same as that of this barrel of water, what is the mass of this barrel of alcohol?

Solution: Suppose the mass of alcohol is 1, then the mass of water is (1+25%) according to the meaning of the question.

Given that the mass of water is 25 kg, the mass of alcohol is 25÷( 1+25%)=20 (kg).

A: The mass of this barrel of wine is 20 kilograms.

I hope my answer is helpful to you ~