Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/21 of 24/40?"
1221 × 2440 is 1235.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21×24/40 12/21×48/40 12/42×24/40 12/21×24/80 36/21×24/40 12/21×72/40 12/63×24/40 60/21×24/40 84/21×24/40
© everydaycalculation.com