Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 8/21 of 40/70?"
821 × 4070 is 32147.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21×40/70 8/21×80/70 8/42×40/70 24/21×40/70 8/63×40/70 40/21×40/70 56/21×40/70
© everydaycalculation.com