Question

A restaurant uses 80% of its oil in one week. They now have 28 quarts of olive oil left. How do you use a double number line to find the number of quarts the restaurant had at the beginning of the week

Answer 1

140

Explanation:

Answer 2

140 quarts of olive oil

Explanation:

we know that

A restaurant uses 80% of its oil in one week.

They now have 28 quarts of olive oil left

`100\%-80\%=20\%`

so

28 quarts of olive oil correspond to the 20%

see the attached figure to better understand the problem

by proportion

Find out the the number of quarts the restaurant had at the beginning of the week (100%)

Let

x ----> the number of quarts the restaurant had at the beginning of the week

`(28)/(20\%)=(x)/(100\%)\\\\x=100(28)/20\\\\x=140\ quarts`

Complete the double number line attached