Subtract 9/28 from 2/90
2/90 - 9/28 is -377/1260.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
2/90 = 2 × 14/90 × 14 = 28/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
9/28 = 9 × 45/28 × 45 = 405/1260 - Subtract the two like fractions:
28/1260 - 405/1260 = 28 - 405/1260 = -377/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/90-9/28 2/90-18/28 2/90-9/56 6/90-9/28 2/90-27/28 2/90-9/84 10/90-9/28 2/90-45/28 14/90-9/28 2/90-63/28