Solutions by everydaycalculation.com
1st number: 1 6/15, 2nd number: 3/21
This multiplication involving fractions can also be rephrased as "What is 21/15 of 3/21?"
2115 × 321 is 15.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15×3/21 21/15×6/21 21/30×3/21 21/15×3/42 63/15×3/21 21/15×9/21 21/45×3/21 21/15×3/63 21/15×15/21 21/75×3/21
© everydaycalculation.com