Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/10 of 20/90?"
410 × 2090 is 445.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10×20/90 4/10×40/90 4/20×20/90 12/10×20/90 4/10×60/90 4/30×20/90 20/10×20/90 4/50×20/90 28/10×20/90 4/70×20/90
© everydaycalculation.com