Solutions by everydaycalculation.com
79 - 78 is -772.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9-7/8 7/9-14/8 7/18-7/8 7/9-7/16 21/9-7/8 7/9-21/8 7/27-7/8 7/9-7/24 35/9-7/8 7/9-35/8 7/45-7/8 7/9-7/40 49/9-7/8 7/9-49/8 7/63-7/8 7/9-7/56
© everydaycalculation.com