Solutions by everydaycalculation.com
221 - 121 is 121.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-1/21 2/21-2/21 2/42-1/21 2/21-1/42 6/21-1/21 2/21-3/21 2/63-1/21 2/21-1/63 10/21-1/21 2/21-5/21 14/21-1/21 2/21-7/21
© everydaycalculation.com