Subtract 15/27 from 7/30
7/30 - 15/27 is -29/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
7/30 = 7 × 9/30 × 9 = 63/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
15/27 = 15 × 10/27 × 10 = 150/270 - Subtract the two like fractions:
63/270 - 150/270 = 63 - 150/270 = -87/270 - After reducing the fraction, the answer is -29/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-15/27 7/30-30/27 7/60-15/27 7/30-15/54 21/30-15/27 7/30-45/27 7/90-15/27 7/30-15/81 35/30-15/27 7/30-75/27 49/30-15/27