Question

Jill spent 12% of her money on a book. After buying the book, she had $120.12. How much money did Jill have before buying the book?

Answer 1

Jill had $136.50 before buying the book.

Explanation:

Let x be the total amount that Jill had

Then 12% of x is 0.12x

Jill was left with $120.12 after buying the book

Subtracting the cost of book from the total amount will given us the remaining amount.

Which means

`x - 0.12x = 120.12\\0.88x = 120.12\\x = (120.12)/(0.88) \\x = 136.50`

Hence,

Jill had $136.50 before buying the book.