Subtract 9/90 from 2/28
2/28 - 9/90 is -1/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
2/28 = 2 × 45/28 × 45 = 90/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
9/90 = 9 × 14/90 × 14 = 126/1260 - Subtract the two like fractions:
90/1260 - 126/1260 = 90 - 126/1260 = -36/1260 - After reducing the fraction, the answer is -1/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/28-9/90 2/28-18/90 2/56-9/90 6/28-9/90 2/28-27/90 2/84-9/90 10/28-9/90 2/28-45/90 14/28-9/90 2/28-63/90