Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/28 of 21/63?"
2028 × 2163 is 521.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28×21/63 20/28×42/63 20/56×21/63 60/28×21/63 20/84×21/63
© everydaycalculation.com