Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 10/40 of 21/42?"
1040 × 2142 is 18.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40×21/42 10/80×21/42 10/40×21/84 30/40×21/42 10/40×63/42 50/40×21/42 70/40×21/42
© everydaycalculation.com