Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 1/21 of 30/90?"
121 × 3090 is 163.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21×30/90 1/21×60/90 1/42×30/90 3/21×30/90 1/63×30/90 5/21×30/90 7/21×30/90
© everydaycalculation.com