Question

Write a proportion for the following problem: The tax on a book costing $84 is $6. At the same tax rate, what is the tax on a book costing $68?


a)84/6 = x/68

b)6/84 = 86/x

c)84/6 = 68/x

D)84/68 = x/6

Answer 1

The tax rate is going to be tax/total.
This will tell us the amount the % of tax applied to the book.

We can write it like this,\[\large \frac{6}{84}\]

And they're asking us to use the `same` tax rate for the other book. Meaning, set up the fraction in the same way, tax divided by total.

So we'll do the same thing, we'll take the tax being applied to this book (our unknown, we'll call it x) and divide it by the total cost of the book.

\[\large \frac{x}{68}\]

If we're using the same tax rate, we'll set these fraction equal to one another.
If that was too confusing, you can let me know c:

Answer 2

i got it , Thanks (: