Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/21 of 9/90?"
421 × 990 is 2105.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21×9/90 4/21×18/90 4/42×9/90 12/21×9/90 4/21×27/90 4/63×9/90 20/21×9/90 4/21×45/90 28/21×9/90 4/21×63/90
© everydaycalculation.com