Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 3/21 of 15/40?"
321 × 1540 is 356.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21×15/40 3/21×30/40 3/42×15/40 3/21×15/80 9/21×15/40 3/21×45/40 3/63×15/40 15/21×15/40 3/21×75/40
© everydaycalculation.com