Final answer:
The decimal expansions of the fractions given are 0.5 for ½, 0.625 for ⅝, and 0.75 for ¾. All of these fractions expand to terminating decimals. The order from least to greatest is 0.5, 0.625, and 0.75.
Step-by-step explanation:
The fraction ¾ of a teaspoon translates to the decimal 0.75, since there are four quarters in a whole, and 0.75 is three of those quarters. Similarly, ½ of a tablespoon can be understood as 0.5 since there are two halves in a whole. Lastly, ⅝ of a cup is equal to 0.625 because there are eight eighths in a whole and five of those eighths would give us five times 0.125, which equals 0.625.
When comparing these decimals to determine the order from least to greatest, we see that 0.5 (the tablespoon measurement) is the smallest, followed by 0.625 (the cup measurement), and finally 0.75 (the teaspoon measurement is the largest). Since all these decimals come to an end, they are known as terminating decimals.