Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 5/20 of 21/80?"
520 × 2180 is 21320.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20×21/80 5/20×42/80 5/40×21/80 15/20×21/80 5/20×63/80 5/60×21/80 25/20×21/80 35/20×21/80
© everydaycalculation.com