Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 28/40 of 21/70?"
2840 × 2170 is 21100.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40×21/70 28/40×42/70 28/80×21/70 84/40×21/70 28/40×63/70
© everydaycalculation.com