Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/20 of 15/81?"
520 × 1581 is 5108.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20×15/81 5/20×30/81 5/40×15/81 15/20×15/81 5/20×45/81 5/60×15/81 25/20×15/81 5/20×75/81 35/20×15/81
© everydaycalculation.com