Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 15/90 of 15/21?"
1590 × 1521 is 542.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90×15/21 15/90×30/21 15/90×15/42 45/90×15/21 15/90×45/21 15/90×15/63 75/90×15/21 15/90×75/21
© everydaycalculation.com