Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/21 of 21/28?"
521 × 2128 is 528.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21×21/28 5/21×42/28 5/42×21/28 5/21×21/56 15/21×21/28 5/21×63/28 5/63×21/28 5/21×21/84 25/21×21/28 35/21×21/28
© everydaycalculation.com