Subtract 28/30 from 3/27
3/27 - 28/30 is -37/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 30 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
3/27 = 3 × 10/27 × 10 = 30/270 - Likewise, for the 2nd fraction, since 30 × 9 = 270,
28/30 = 28 × 9/30 × 9 = 252/270 - Subtract the two like fractions:
30/270 - 252/270 = 30 - 252/270 = -222/270 - After reducing the fraction, the answer is -37/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/27-28/30 3/27-56/30 3/54-28/30 3/27-28/60 9/27-28/30 3/27-84/30 3/81-28/30 3/27-28/90 15/27-28/30 21/27-28/30