Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 12/90?"
2021 × 1290 is 863.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×12/90 20/21×24/90 20/42×12/90 60/21×12/90 20/21×36/90 20/63×12/90 20/21×60/90 20/21×84/90
© everydaycalculation.com