1. The problem statement, all variables and given/known data In each of the following the properties of a compound are given. In each case find A:B:C 1. 1/5 of A, 2/3 of B and the remainder of C. 2. 3/8 of A with B and C in the ratio 1:2. 3. A, B and C are mixed according to the ratios A:B= 2:5 and B:C=10:11. 2. Relevant equations 3. The attempt at a solution I could only solve the 1st one: The common denominator is 15 so 15/3*2=10 and 15/5*1=3. That means A and B are in the ratio 3:10. 15/15-13/15=2/15 so A:B:C are in the ratio of 10:3:2 Couldn't solve the other two. Please, help. Thanks.