Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/42 of 1/10?"
2142 × 110 is 120.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42×2/10 21/84×1/10 21/42×1/20 63/42×1/10 21/42×3/10 21/42×1/30 21/42×5/10 21/42×1/50 21/42×7/10 21/42×1/70
© everydaycalculation.com