Solutions by everydaycalculation.com
210421 is already in the simplest form. It can be written as 0.498812 in decimal form (rounded to 6 decimal places).
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Equivalent fractions: 420/842 630/1263 1050/2105 1470/2947
More fractions: 420/421 210/842 630/421 210/1263 211/421 210/422209/421 210/420
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