Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 15/40 of 15/81?"
1540 × 1581 is 572.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40×15/81 15/40×30/81 15/80×15/81 45/40×15/81 15/40×45/81 75/40×15/81 15/40×75/81
© everydaycalculation.com