Solutions by everydaycalculation.com
The simplest form of 9090 is 11.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Equivalent fractions: 180/180 45/45 270/270 30/30 450/450 18/18 630/630
More fractions: 180/90 90/180 270/90 90/270 91/90 90/9189/90 90/89
© everydaycalculation.com