Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 4/21 of 16/80?"
421 × 1680 is 4105.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21×16/80 4/21×32/80 4/42×16/80 12/21×16/80 4/21×48/80 4/63×16/80 20/21×16/80 28/21×16/80
© everydaycalculation.com