Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/42 of 6/21?"
2142 × 621 is 17.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42×12/21 21/84×6/21 21/42×6/42 63/42×6/21 21/42×18/21 21/42×6/63 21/42×30/21 21/42×42/21
© everydaycalculation.com