Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 84/90 of 12/21?"
8490 × 1221 is 815.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90×24/21 84/90×12/42 84/90×36/21 84/90×12/63 84/90×60/21 84/90×84/21
© everydaycalculation.com