fractions which are equal to 21 = 21/1, 42/2, 63/3,...
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21 ounces can be expressed as a fraction by recognizing that 1 pound is equivalent to 16 ounces. Therefore, 21 ounces is equal to 21/16 pounds. This fraction can be simplified to 1 5/16 pounds.
.84 = 84/100 = 42/50 = 21/25
As a mixed number 8.4 would equal 8 and 2/5. As an improper fraction, 8.4 would equal 42/5.
21 thousandths = 0.021 = 21/1000 in fraction