Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 18/20 of 63/81?"
1820 × 6381 is 710.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20×63/81 18/40×63/81 54/20×63/81 18/60×63/81 90/20×63/81
© everydaycalculation.com