Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/28 of 21/45?"
2128 × 2145 is 720.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28×21/45 21/28×42/45 21/56×21/45 21/28×21/90 63/28×21/45 21/28×63/45 21/84×21/45
© everydaycalculation.com