Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/5 of 20/63?"
45 × 2063 is 1663.
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Related: 8/5×20/63 4/5×40/63 4/10×20/63 12/5×20/63 4/5×60/63 4/15×20/63 20/5×20/63 4/25×20/63 28/5×20/63 4/35×20/63
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