Solutions by everydaycalculation.com
720 - 820 is -120.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20-8/20 7/20-16/20 7/40-8/20 7/20-8/40 21/20-8/20 7/20-24/20 7/60-8/20 7/20-8/60 35/20-8/20 7/20-40/20 49/20-8/20 7/20-56/20
© everydaycalculation.com