Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 15/63 of 21/40?"
1563 × 2140 is 18.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/63×21/40 15/63×42/40 15/63×21/80 45/63×21/40 15/63×63/40 75/63×21/40
© everydaycalculation.com