Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/21 of 20/28?"
421 × 2028 is 20147.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21×20/28 4/21×40/28 4/42×20/28 4/21×20/56 12/21×20/28 4/21×60/28 4/63×20/28 4/21×20/84 20/21×20/28 28/21×20/28
© everydaycalculation.com