Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 15/21 of 12/63?"
1521 × 1263 is 20147.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21×12/63 15/21×24/63 15/42×12/63 45/21×12/63 15/21×36/63 15/63×12/63 75/21×12/63 15/21×60/63 15/21×84/63
© everydaycalculation.com