Maths Percentage (6th Grade)
posted by Sam on .
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.
35% of the number of books Ibrahim owns are fiction boos, find:
a.) the total number of books he owns.
b.) the number of nonfiction books he owns.
Please show me your complete workings. Thank you very much.

nonalgebraic 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. 
100 / 10 = 10
5 x 10 = 50
The answer is $50