Final answer:
Decimals are used in everyday life when dealing with money in situations such as shopping and calculating expenses.
Step-by-step explanation:
The subject of the question is Mathematics.
One way that decimals are used in everyday life is when dealing with money. For example, when shopping, the prices of items may be expressed as decimals. If you have $10.50 and you buy something that costs $3.75, you would need to subtract 3.75 from 10.50 to find out how much money you have left.