This is a really easy question. Use your calculator to convert the given fractions into their decimal equivalents and find the decimal among the choices that falls between the two results you obtained. The fraction 1/5 converts to 0.20, while 1/4 converts to 0.25. Of the given choices, only 0.21 falls between these two, which is choice D.
If you need to practice converting fractions to decimals, and vice versa, go to AAA Math.
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