Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/24 of 12/40?"
2124 × 1240 is 2180.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24×12/40 21/24×24/40 21/48×12/40 21/24×12/80 63/24×12/40 21/24×36/40 21/72×12/40 21/24×60/40 21/24×84/40
© everydaycalculation.com