Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 15/80 of 40/54?"
1580 × 4054 is 536.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/80×40/54 15/80×80/54 45/80×40/54 75/80×40/54
© everydaycalculation.com