What about repeating decimals? Those are decimals in which a digit or group of digits repeats indefinitely. You might not think
it at first, but all repeating decimals are rational, too. 1
3
3
1
is a ratio of integers. You probably know that as a decimal,
1
3
3
1
repeats. It looks like this:
To find the sales tax multiply the purchase price by the sales tax rate. Remember to convert the sales tax rate from a percent to a decimal number. Once the sales tax is calculated, it is added to the purchase price. The result is the total cost—this is what the customer pays.
