Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/90 of 9/21?"
2190 × 921 is 110.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90×9/21 21/90×18/21 21/90×9/42 63/90×9/21 21/90×27/21 21/90×9/63 21/90×45/21 21/90×63/21
© everydaycalculation.com