Solutions by everydaycalculation.com
The simplest form of 420210 is 21.
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Equivalent fractions: 840/420 210/105 1260/630 140/70 2100/1050 84/42 2940/1470 60/30
More fractions: 840/210 420/420 1260/210 420/630 421/210 420/211419/210 420/209
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