CPM Homework Help : MC1 Problem 4-101

If a gas tank can hold $60$ liters of gas, copy and label the percent ruler below on your paper and use it to find how many liters are in the tank when it is:

A percent ruler scaled by 10%. Above the 0% is 0 liters. Above 100% is 60 liters.

$50\%$ full

$\frac { 7 } { 10 }$ full

$\frac{2}{5}$ full

Hint (a):

$50\%$ is equal to one half. What is one half of $60$ liters?

Answer (a):

30 L Added to the percent ruler is 30 liters under 50%.

Hint (b):

If you divide $60$ liters into $10$ parts, there will be $6$ liters each. How many liters would there be if you had $7$ of these groups? Added to the percent ruler: 6 liters under 10%.

Hint (c):

This problem is similar to part (b). When you divide $60$ liters into $5$ parts, each part has $12$ liters. Added to the percent ruler: 12 liters under 20%