Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/21 of 9/90?"
1221 × 990 is 235.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21×9/90 12/21×18/90 12/42×9/90 36/21×9/90 12/21×27/90 12/63×9/90 60/21×9/90 12/21×45/90 84/21×9/90 12/21×63/90
© everydaycalculation.com