Solutions by everydaycalculation.com
830 - 2430 is -815.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/30-24/30 8/30-48/30 8/60-24/30 8/30-24/60 24/30-24/30 8/30-72/30 8/90-24/30 8/30-24/90 40/30-24/30 56/30-24/30
© everydaycalculation.com