Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/90 of 3/12?"
2190 × 312 is 7120.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90×3/12 21/90×6/12 21/90×3/24 63/90×3/12 21/90×9/12 21/90×3/36 21/90×15/12 21/90×3/60 21/90×21/12 21/90×3/84
© everydaycalculation.com