Solutions by everydaycalculation.com
1690 - 690 is 19.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/90-6/90 16/90-12/90 48/90-6/90 16/90-18/90 80/90-6/90 16/90-30/90 16/90-42/90
© everydaycalculation.com