Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/72 of 21/90?"
1272 × 2190 is 7180.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/72×21/90 12/72×42/90 36/72×21/90 12/72×63/90 60/72×21/90 84/72×21/90
© everydaycalculation.com