Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 15/18?"
2021 × 1518 is 5063.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×15/18 20/21×30/18 20/42×15/18 20/21×15/36 60/21×15/18 20/21×45/18 20/63×15/18 20/21×15/54 20/21×75/18 20/21×15/90
© everydaycalculation.com