Question

If you buy a package of 20 rolls of paper towels for $38.15 how much money does 1 paper towel roll cost at the same unit rate

Answer 1

Answer: $1.90

Step-by-step explanation:

Divide 38.15 by 20.

Since

20 rolls = $38.15

1 roll = ?

Here it is in simple terms. So, if we already know the cost of 1 roll, to find 20 rolls, we have to multiply the cost of 1 roll by 20 rolls. However, since that is not the case, it is the opposite, we'll do the opposite operation. Meaning we divide. So that's why we are dividing. Nevertheless, there are other ways of doing this. For example, setting up fractions. But this way is simple and easy, so you'll rememeber.

$\frac{38.15}{20}\\\\1.9075$

In tenths place, it is $1.90, therefore the cost of 1 paper towel at the same unit rate is $1.90.