Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/15 of 12/21?"
515 × 1221 is 421.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15×12/21 5/15×24/21 5/30×12/21 5/15×12/42 5/15×36/21 5/45×12/21 5/15×12/63 25/15×12/21 5/15×60/21 5/75×12/21 35/15×12/21 5/15×84/21
© everydaycalculation.com