Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/40 of 35/81?"
2040 × 3581 is 35162.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40×70/81 20/80×35/81 60/40×35/81
© everydaycalculation.com