Solutions by everydaycalculation.com
1st number: 5 0/4, 2nd number: 5/21
This multiplication involving fractions can also be rephrased as "What is 20/4 of 5/21?"
204 × 521 is 2521.
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Related: 40/4×5/21 20/4×10/21 20/8×5/21 20/4×5/42 60/4×5/21 20/4×15/21 20/12×5/21 20/4×5/63 20/4×25/21 20/4×35/21 20/28×5/21
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