Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 21/40 of 16/63?"
2140 × 1663 is 215.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40×16/63 21/40×32/63 21/80×16/63 63/40×16/63 21/40×48/63 21/40×80/63
© everydaycalculation.com