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when you get gas, use money, or measure your self
In money, where it is always present. A common example is $0.99
Almost every number that almost every ordinary person uses in his personal life on almost every typical day is a rational number.
There are no such numbers, because every number has a decimal representation. But you can have photo negatives and photo positives which will have no fractions or decimals.
A job. Most jobs will use these some time or another.