Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/15 of 7/21?"
1215 × 721 is 415.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15×7/21 12/15×14/21 12/30×7/21 12/15×7/42 36/15×7/21 12/45×7/21 12/15×7/63 60/15×7/21 12/15×35/21 12/75×7/21 84/15×7/21 12/15×49/21
© everydaycalculation.com