Question

When full, the gas tank of a car holds 15 gallons. It now contains 12 gallons. What percent represents how full the tank is.Answer with supporting work

Answer 1

To calculate the percentage that some quantity is of another one, we calculate the ration from the part we want to calculate by the one which is the 100% and multiplicate it by 100. The result is the percentage.

From this, we can calculate as follows:

`\begin{gathered} P_{\text{ \%}}=\frac{V_{to\text{ calculate}}}{V_{\text{ which is 100\%}}}*100\text{ \%} \\ P=(12)/(15)*100=0.8*100=80\text{ \%} \end{gathered}`

From the calculation presented, we are able to conclude that 12 gallons represent 80% of 15 gallons.