Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/40 of 4/10?"
2040 × 410 is 15.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40×8/10 20/80×4/10 20/40×4/20 60/40×4/10 20/40×12/10 20/40×4/30 20/40×20/10 20/40×4/50 20/40×28/10 20/40×4/70
© everydaycalculation.com