Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 15/21 of 10/20?"
1521 × 1020 is 514.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21×10/20 15/42×10/20 15/21×10/40 45/21×10/20 15/21×30/20 15/63×10/20 15/21×10/60 75/21×10/20 15/21×50/20 15/21×70/20
© everydaycalculation.com