Question

You usually buy a 16.5-ounce bottle of shampoo. There is a new bottle that says it gives you 30% more free. Use the drop-down menus to build an equation that could be used to find the size of the larger bottle, x.

Answer 1

x = 16.5+0.3(16.5) or x = 16.5(1.3)

Explanation:

30% = 30/100 = 0.3. To find an extra 30%, we would multiply this by the amount of shampoo, 16.5 ounces:

0.3(16.5)

We would then add this to the original amount, 16.5:

16.5+0.3(16.5)

We can also view this as one percentage. We would have 100% of the original amount, 16.5 ounces, and an extra 30%; 100+30 = 130%; 130% = 130/100 = 1.3.

We would then multiply this by the original amount, 16.5:

16.5(1.3)

Answer 2

.30 = (new- 16.5) /16.5

Explanation:

percent increase = (new - original)/original

.30 = (new- 16.5) /16.5