Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/10 of 10/21?"
410 × 1021 is 421.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10×10/21 4/10×20/21 4/20×10/21 4/10×10/42 12/10×10/21 4/10×30/21 4/30×10/21 4/10×10/63 20/10×10/21 4/10×50/21 4/50×10/21 28/10×10/21 4/10×70/21 4/70×10/21
© everydaycalculation.com