Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 40/72?"
2021 × 4072 is 100189.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×40/72 20/21×80/72 20/42×40/72 60/21×40/72 20/63×40/72
© everydaycalculation.com