exam Maths Puzzle Numerical Ability

im not exactly sure on how to factor the denominators in this problem.

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exam Other Question

A newspaper has 12,240,000 subscribers this year. The number of subscribers is down 8% from last year. How many subscribers were there last year? Only info is Form A,Chapter 1-6 Cuulative Assessment Simplify.

1+(1/3) over 1-(3/7) = ??????

I used the parentheses to show that, for example, it is not 1+1 over 3, but 1 plus 1/3. The same stands for the second part of the problem.