Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 7/28?"
2021 × 728 is 521.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×7/28 20/21×14/28 20/42×7/28 20/21×7/56 60/21×7/28 20/21×21/28 20/63×7/28 20/21×7/84 20/21×35/28 20/21×49/28
© everydaycalculation.com