Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/21 of 18/40?"
521 × 1840 is 328.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21×18/40 5/21×36/40 5/42×18/40 5/21×18/80 15/21×18/40 5/21×54/40 5/63×18/40 25/21×18/40 5/21×90/40 35/21×18/40
© everydaycalculation.com