Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/20 of 4/5?"
420 × 45 is 425.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20×4/5 4/20×8/5 4/40×4/5 4/20×4/10 12/20×4/5 4/20×12/5 4/60×4/5 4/20×4/15 4/20×20/5 4/20×4/25 28/20×4/5 4/20×28/5 4/20×4/35
© everydaycalculation.com