Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 15/80 of 42/81?"
1580 × 4281 is 772.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/80×42/81 15/80×84/81 45/80×42/81 75/80×42/81
© everydaycalculation.com