Solutions by everydaycalculation.com
1290 - 4090 is -1445.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90-40/90 12/90-80/90 36/90-40/90 60/90-40/90 84/90-40/90
© everydaycalculation.com