David has $5 in his wallet. This was 10% of the amount that he received from his mother. Find the total amount of money that David received from his mother.

Question

35% of the number of books Ibrahim owns are fiction boos, find:
a.) the total number of books he owns.
b.) the number of non-fiction books he owns.

Please show me your complete workings. Thank you very much.

Answer 1

non-algebraic way:

5% = $5
so 1% = 5/5 = $1
100% = 100(1) = $100

algebraic way:
.05x = 5
x = 5/.05 = 100

Do your second question in the same way.

Answer 2

100 / 10 = 10
5 x 10 = 50

The answer is $50

Answer 3

10%=$5
1%=$5/10=0.5
100%=0.

Answer 4

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