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