Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/90 of 20/72?"
2190 × 2072 is 7108.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90×20/72 21/90×40/72 63/90×20/72 21/90×60/72
© everydaycalculation.com