Solutions by everydaycalculation.com
1421 - 57 is -121.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/21-5/7 14/21-10/7 14/42-5/7 14/21-5/14 42/21-5/7 14/21-15/7 14/63-5/7 14/21-5/21 70/21-5/7 14/21-25/7 14/21-5/35 98/21-5/7 14/21-35/7 14/21-5/49
© everydaycalculation.com