Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 1/21 of 21/30?"
121 × 2130 is 130.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21×21/30 1/21×42/30 1/42×21/30 1/21×21/60 3/21×21/30 1/21×63/30 1/63×21/30 1/21×21/90 5/21×21/30 7/21×21/30
© everydaycalculation.com