Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/40 of 75/81?"
1240 × 7581 is 518.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40×75/81 12/80×75/81 36/40×75/81 60/40×75/81 84/40×75/81
© everydaycalculation.com