Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/21 of 45/90?"
521 × 4590 is 542.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21×45/90 5/42×45/90 15/21×45/90 5/63×45/90 25/21×45/90 35/21×45/90
© everydaycalculation.com