Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/70 of 40/60?"
2070 × 4060 is 421.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70×40/60 20/70×80/60 60/70×40/60
© everydaycalculation.com