There are 3.33 litres of part A and 6.67 litres of part B. When they are completely mixed together, they make 10 litres of paint.

Question

How much of part B would you need if you are only using one litre of part A

Answer 1

A/B = 3.33/6.67
1/B = 3.33/6.67

B = 6.67/3.33 = 2