Solutions by everydaycalculation.com
550 - 650 is -150.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/50-6/50 5/50-12/50 15/50-6/50 5/50-18/50 25/50-6/50 5/50-30/50 35/50-6/50 5/50-42/50
© everydaycalculation.com