Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/21 of 21/42?"
521 × 2142 is 542.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21×21/42 5/42×21/42 5/21×21/84 15/21×21/42 5/21×63/42 5/63×21/42 25/21×21/42 35/21×21/42
© everydaycalculation.com