Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/21 of 21/35?"
1221 × 2135 is 1235.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21×21/35 12/21×42/35 12/42×21/35 12/21×21/70 36/21×21/35 12/21×63/35 12/63×21/35 60/21×21/35 84/21×21/35
© everydaycalculation.com