Solutions by everydaycalculation.com
The simplest form of 4002100 is 421.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Equivalent fractions: 800/4200 200/1050 1200/6300 80/420
More fractions: 800/2100 400/4200 1200/2100 400/6300 401/2100 400/2101399/2100 400/2099
© everydaycalculation.com