Solutions by everydaycalculation.com
221 - 1621 is -23.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-16/21 2/21-32/21 2/42-16/21 2/21-16/42 6/21-16/21 2/21-48/21 2/63-16/21 2/21-16/63 10/21-16/21 2/21-80/21 14/21-16/21
© everydaycalculation.com