Subtract 9/60 from 28/90
28/90 - 9/60 is 29/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
28/90 = 28 × 2/90 × 2 = 56/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
9/60 = 9 × 3/60 × 3 = 27/180 - Subtract the two like fractions:
56/180 - 27/180 = 56 - 27/180 = 29/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90-9/60 28/90-18/60 84/90-9/60 28/90-27/60 28/90-45/60 28/90-63/60