Solutions by everydaycalculation.com
621 - 521 is 121.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-5/21 6/21-10/21 6/42-5/21 6/21-5/42 18/21-5/21 6/21-15/21 6/63-5/21 6/21-5/63 30/21-5/21 6/21-25/21 42/21-5/21 6/21-35/21
© everydaycalculation.com