Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 10/20 of 80/90?"
1020 × 8090 is 49.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/40×80/90 30/20×80/90 10/60×80/90 50/20×80/90 70/20×80/90
© everydaycalculation.com