Solutions by everydaycalculation.com
This multiplication involving fractions can also be rephrased as "What is 20/21 of 21/50?"
2021 × 2150 is 25.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21×21/50 20/21×42/50 20/42×21/50 60/21×21/50 20/21×63/50 20/63×21/50
© everydaycalculation.com