Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 3/12 of 21/90?"
312 × 2190 is 7120.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12×21/90 3/12×42/90 3/24×21/90 9/12×21/90 3/12×63/90 3/36×21/90 15/12×21/90 3/60×21/90 21/12×21/90 3/84×21/90
© everydaycalculation.com