Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/42 of 9/20?"
2142 × 920 is 940.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42×18/20 21/84×9/20 21/42×9/40 63/42×9/20 21/42×27/20 21/42×9/60 21/42×45/20 21/42×63/20
© everydaycalculation.com