Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 6/21 of 21/30?"
621 × 2130 is 15.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21×21/30 6/21×42/30 6/42×21/30 6/21×21/60 18/21×21/30 6/21×63/30 6/63×21/30 6/21×21/90 30/21×21/30 42/21×21/30
© everydaycalculation.com