Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 40/90 of 25/40?"
4090 × 2540 is 518.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90×25/40 40/90×50/40 40/90×25/80 40/90×75/40
© everydaycalculation.com