Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 80/90 of 5/21?"
8090 × 521 is 40189.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90×10/21 80/90×5/42 80/90×15/21 80/90×5/63 80/90×25/21 80/90×35/21
© everydaycalculation.com