Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 42/56?"
2021 × 4256 is 57.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×42/56 20/21×84/56 20/42×42/56 60/21×42/56 20/63×42/56
© everydaycalculation.com