Solutions by everydaycalculation.com
1242 - 1042 is 121.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-10/42 12/42-20/42 12/84-10/42 12/42-10/84 36/42-10/42 12/42-30/42 60/42-10/42 12/42-50/42 84/42-10/42 12/42-70/42
© everydaycalculation.com