book Maths Puzzle Numerical Ability

Solve the proportion
(c+3)/(C-1) = (c+2)/(c-3)

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book Other Question

Please help.
Subtract and write answer in simplest form.

y-2/y+3 - y/2y+6

I am getting y-4/2(y+3)

Is this right?
Could you help me add this problem?

27.4 + 213.321 + 39.38

Thanks!