Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 3/21 of 1/40?"
321 × 140 is 1280.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21×1/40 3/21×2/40 3/42×1/40 3/21×1/80 9/21×1/40 3/21×3/40 3/63×1/40 15/21×1/40 3/21×5/40 3/21×7/40
© everydaycalculation.com