Solutions by everydaycalculation.com
1230 - 2430 is -25.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/30-24/30 12/30-48/30 12/60-24/30 12/30-24/60 36/30-24/30 12/30-72/30 12/90-24/30 12/30-24/90 60/30-24/30 84/30-24/30
© everydaycalculation.com