Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 1/21 of 10/90?"
121 × 1090 is 1189.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21×10/90 1/21×20/90 1/42×10/90 3/21×10/90 1/21×30/90 1/63×10/90 5/21×10/90 1/21×50/90 7/21×10/90 1/21×70/90
© everydaycalculation.com