School library

The school library contains 6300 books. With this constitutes 7% of professional books for teachers 18% interest books and encyclopedias for pupils and the rest of the fairy tales. How much are which books?

Correct result:

a =  441
b =  1134
c =  4725

Solution:

a=6300 7/100=441a=6300 \cdot \ 7/100=441
b=6300 18/100=1134b=6300 \cdot \ 18/100=1134
c=6300 (100718)/100=4725c=6300 \cdot \ (100-7-18)/100=4725



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