Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/42 of 18/21?"
2142 × 1821 is 37.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42×36/21 21/84×18/21 21/42×18/42 63/42×18/21 21/42×54/21 21/42×18/63 21/42×90/21
© everydaycalculation.com