Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 12/20 of 12/90?"
1220 × 1290 is 225.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20×12/90 12/20×24/90 12/40×12/90 36/20×12/90 12/20×36/90 12/60×12/90 60/20×12/90 12/20×60/90 84/20×12/90 12/20×84/90
© everydaycalculation.com