Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/70 of 2/10?"
2170 × 210 is 350.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70×2/10 21/70×4/10 21/70×2/20 63/70×2/10 21/70×6/10 21/70×2/30 21/70×2/50 21/70×14/10 21/70×2/70
© everydaycalculation.com