Solutions by everydaycalculation.com
670 - 2070 is -15.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/70-20/70 6/70-40/70 18/70-20/70 6/70-60/70 30/70-20/70 42/70-20/70
© everydaycalculation.com