Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/15 of 20/81?"
515 × 2081 is 20243.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15×20/81 5/15×40/81 5/30×20/81 5/15×60/81 5/45×20/81 25/15×20/81 5/75×20/81 35/15×20/81
© everydaycalculation.com