Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/5 of 5/7?"
45 × 57 is 47.
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Related: 8/5×5/7 4/5×10/7 4/10×5/7 4/5×5/14 12/5×5/7 4/5×15/7 4/15×5/7 4/5×5/21 20/5×5/7 4/5×25/7 4/25×5/7 4/5×5/35 28/5×5/7 4/5×35/7 4/35×5/7 4/5×5/49
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