Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/40 of 40/45?"
2140 × 4045 is 715.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40×40/45 21/40×80/45 21/80×40/45 21/40×40/90 63/40×40/45
© everydaycalculation.com