Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/30 of 10/90?"
2130 × 1090 is 790.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30×10/90 21/30×20/90 21/60×10/90 63/30×10/90 21/30×30/90 21/90×10/90 21/30×50/90 21/30×70/90
© everydaycalculation.com