Solutions by everydaycalculation.com
1820 - 1420 is 15.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-14/20 18/20-28/20 18/40-14/20 18/20-14/40 54/20-14/20 18/20-42/20 18/60-14/20 18/20-14/60 90/20-14/20 18/20-70/20 18/20-98/20
© everydaycalculation.com