Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 9/21 of 21/72?"
921 × 2172 is 18.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21×21/72 9/21×42/72 9/42×21/72 27/21×21/72 9/21×63/72 9/63×21/72 45/21×21/72 63/21×21/72
© everydaycalculation.com