Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/40 of 12/21?"
1240 × 1221 is 635.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40×12/21 12/40×24/21 12/80×12/21 12/40×12/42 36/40×12/21 12/40×36/21 12/40×12/63 60/40×12/21 12/40×60/21 84/40×12/21 12/40×84/21
© everydaycalculation.com