book Maths Puzzle Numerical Ability

I don't understand these kind of problem: 4 1/6 x
=
2 1/4 3/5

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book Other Question

g(x)=-x^2+x-5 I am having trouble with a problem, I think I found the answer but, I am not sure. My question is Solve the subtraction problem 8/9 - 3/4? I think the answer is 5/36? Am I right, Please let me know.