Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 18/21 of 10/90?"
1821 × 1090 is 221.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21×10/90 18/21×20/90 18/42×10/90 54/21×10/90 18/21×30/90 18/63×10/90 90/21×10/90 18/21×50/90 18/21×70/90
© everydaycalculation.com