Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 3/10?"
2021 × 310 is 27.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×3/10 20/21×6/10 20/42×3/10 20/21×3/20 60/21×3/10 20/21×9/10 20/63×3/10 20/21×3/30 20/21×15/10 20/21×3/50 20/21×21/10 20/21×3/70
© everydaycalculation.com