Given a simple high-school level math question, you are required to solve it and provide the final answer. The final answer is always a single number. These questions can range from a variety of topics like simple arithmetic, solving equations, converting a quantity from one unit to another, finding remainders/GCD/LCM, finding probabilities etc. Each question has only one correct answer. This answer can be a positive or negative integer, a fraction or a decimal number. If the answer is a negative number use the hyphen (e.g. -42) symbol for the minus sign. For decimal numbers, do not add extra zeros after the decimal point. For fractional numbers, separate the numerator and denominator using a forward slash (e.g. 3/25).

[Q]: Evaluate 6/(-28)*1*(-16)/12.
[A]: 2/7


[Q]: Let k be 3/(-2)*(-72)/27. Solve k*w - 6 = w for w.
[A]: 2


[Q]: Three letters picked without replacement from {q: 2, w: 7, b: 1, l: 4}. Give prob of sequence wbq.
[A]:
1/156