Solutions by everydaycalculation.com
1540 - 2140 is -320.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40-21/40 15/40-42/40 15/80-21/40 15/40-21/80 45/40-21/40 15/40-63/40 75/40-21/40
© everydaycalculation.com