Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 25/42 of 42/81?"
2542 × 4281 is 2581.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42×42/81 25/42×84/81 25/84×42/81 75/42×42/81
© everydaycalculation.com