Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/21 of 18/40?"
1221 × 1840 is 935.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21×18/40 12/21×36/40 12/42×18/40 12/21×18/80 36/21×18/40 12/21×54/40 12/63×18/40 60/21×18/40 12/21×90/40 84/21×18/40
© everydaycalculation.com