Solutions by everydaycalculation.com
The simplest form of 21090 is 73.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Equivalent fractions: 420/180 105/45 630/270 70/30 1050/450 42/18 1470/630
More fractions: 420/90 210/180 630/90 210/270 211/90 210/91209/90 210/89
© everydaycalculation.com