Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 40/50?"
2021 × 4050 is 1621.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×40/50 20/21×80/50 20/42×40/50 60/21×40/50 20/63×40/50
© everydaycalculation.com