Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/70 of 4/20?"
2170 × 420 is 350.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70×4/20 21/70×8/20 21/70×4/40 63/70×4/20 21/70×12/20 21/70×4/60 21/70×28/20
© everydaycalculation.com