Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/45 of 8/21?"
2145 × 821 is 845.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45×8/21 21/45×16/21 21/90×8/21 21/45×8/42 63/45×8/21 21/45×24/21 21/45×8/63 21/45×40/21 21/45×56/21
© everydaycalculation.com