Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 15/90 of 15/20?"
1590 × 1520 is 18.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90×15/20 15/90×30/20 15/90×15/40 45/90×15/20 15/90×45/20 15/90×15/60 75/90×15/20 15/90×75/20
© everydaycalculation.com