Solutions by everydaycalculation.com
421 - 47 is -821.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-4/7 4/21-8/7 4/42-4/7 4/21-4/14 12/21-4/7 4/21-12/7 4/63-4/7 4/21-4/21 20/21-4/7 4/21-20/7 4/21-4/35 28/21-4/7 4/21-28/7 4/21-4/49
© everydaycalculation.com