self Maths Puzzle

Shelf A has 4/5 of the number of books in A transferred to B and then 25% of the books from B are transfered to A, then the percentage of the total number of books that A will have is

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self Other Question

There are 3 societies A,B,C having some tractors each.
A Gives B and C as many tractors as they already have.
After some days B gives A and C as many tractors as they have.
After some days C gives A and B as many tractors as they have.
Finally each has 24 tractors.what is the original No.of
tractors each had in the beginning? Some toffees are bought at the rate of 11 for Rs 10 and the same number at the rate of 9 for Rs 10. If the whole lot is sold at one rupee per toffee, find the gain or loss %.