Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/90 of 21/70?"
1290 × 2170 is 125.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90×21/70 12/90×42/70 36/90×21/70 12/90×63/70 60/90×21/70 84/90×21/70
© everydaycalculation.com