Solutions by everydaycalculation.com
221 - 921 is -13.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-9/21 2/21-18/21 2/42-9/21 2/21-9/42 6/21-9/21 2/21-27/21 2/63-9/21 2/21-9/63 10/21-9/21 2/21-45/21 14/21-9/21 2/21-63/21
© everydaycalculation.com