Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/42 of 12/45?"
2142 × 1245 is 215.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42×24/45 21/84×12/45 21/42×12/90 63/42×12/45 21/42×36/45 21/42×60/45 21/42×84/45
© everydaycalculation.com