Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 10/20 of 40/81?"
1020 × 4081 is 2081.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20×80/81 10/40×40/81 30/20×40/81 10/60×40/81 50/20×40/81 70/20×40/81
© everydaycalculation.com