Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 8/10 of 42/80?"
810 × 4280 is 2150.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10×42/80 8/10×84/80 8/20×42/80 24/10×42/80 8/30×42/80 40/10×42/80 8/50×42/80 56/10×42/80 8/70×42/80
© everydaycalculation.com