Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 16/21 of 21/30?"
1621 × 2130 is 815.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21×21/30 16/21×42/30 16/42×21/30 16/21×21/60 48/21×21/30 16/21×63/30 16/63×21/30 16/21×21/90 80/21×21/30
© everydaycalculation.com