Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/84 of 20/45?"
2184 × 2045 is 19.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84×20/45 21/84×40/45 21/84×20/90 63/84×20/45 21/84×60/45
© everydaycalculation.com