Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 10/40 of 10/90?"
1040 × 1090 is 136.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40×10/90 10/40×20/90 10/80×10/90 30/40×10/90 10/40×30/90 50/40×10/90 10/40×50/90 70/40×10/90 10/40×70/90
© everydaycalculation.com