Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/40 of 10/72?"
2140 × 1072 is 796.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40×10/72 21/40×20/72 21/80×10/72 63/40×10/72 21/40×30/72 21/40×50/72 21/40×70/72
© everydaycalculation.com