Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 9/10 of 40/81?"
910 × 4081 is 49.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10×40/81 9/10×80/81 9/20×40/81 27/10×40/81 9/30×40/81 45/10×40/81 9/50×40/81 63/10×40/81 9/70×40/81
© everydaycalculation.com