Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 1/3 of 21/90?"
13 × 2190 is 790.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/3×21/90 1/3×42/90 1/6×21/90 1/3×63/90 1/9×21/90 5/3×21/90 1/15×21/90 7/3×21/90 1/21×21/90
© everydaycalculation.com