Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/40 of 30/72?"
2140 × 3072 is 732.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40×30/72 21/40×60/72 21/80×30/72 63/40×30/72 21/40×90/72
© everydaycalculation.com