Solutions by everydaycalculation.com
1630 - 2030 is -215.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/30-20/30 16/30-40/30 16/60-20/30 16/30-20/60 48/30-20/30 16/30-60/30 16/90-20/30 16/30-20/90 80/30-20/30
© everydaycalculation.com