Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/15 of 21/80?"
1215 × 2180 is 21100.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15×21/80 12/15×42/80 12/30×21/80 36/15×21/80 12/15×63/80 12/45×21/80 60/15×21/80 12/75×21/80 84/15×21/80
© everydaycalculation.com