Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/21 of 12/21?"
521 × 1221 is 20147.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21×12/21 5/21×24/21 5/42×12/21 5/21×12/42 15/21×12/21 5/21×36/21 5/63×12/21 5/21×12/63 25/21×12/21 5/21×60/21 35/21×12/21 5/21×84/21
© everydaycalculation.com