Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 63/90 of 7/21?"
6390 × 721 is 730.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/90×14/21 63/90×7/42 63/90×7/63 63/90×35/21 63/90×49/21
© everydaycalculation.com