Question

which type of heating fuel is used least? heating fuel usage steam 25% gas 50% other 5% coal 10% electric 10% electric other steam

Explanation:

Step1: Compare percentages

Compare the percentages of each fuel type: Gas (50%), Steam (25%), Electric (10%), Coal (10%), Other (5%).

Step2: Identify the smallest percentage

The smallest percentage is 5% which corresponds to the 'Other' fuel type.

Answer:

Other