Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 30/80 of 21/45?"
3080 × 2145 is 740.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80×21/45 30/80×42/45 30/80×21/90 90/80×21/45 30/80×63/45
© everydaycalculation.com