Solutions by everydaycalculation.com
The simplest form of 640840 is 1621.
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Equivalent fractions: 1280/1680 320/420 1920/2520 3200/4200 128/168 4480/5880
More fractions: 1280/840 640/1680 1920/840 640/2520 641/840 640/841639/840 640/839
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