Question

how much heating is done by gas? heating fuel usage gas 50% steam 25% other 5% coal 10% electric 10% 50 percent 25 percent 10 percent 5 percent

Explanation:

Step1: Analyze the pie - chart

The pie - chart titled "Heating Fuel Usage" shows the percentage of different fuels used for heating.

Step2: Locate the gas section

In the pie - chart, the section labeled "Gas" is marked as 50%.

Answer:

50 percent