Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 40/70 of 3/21?"
4070 × 321 is 449.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70×3/21 40/70×6/21 40/70×3/42 40/70×9/21 40/70×3/63 40/70×15/21
© everydaycalculation.com