Subtract 7/27 from 3/90
3/90 - 7/27 is -61/270.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 90 × 3 = 270,
3/90 = 3 × 3/90 × 3 = 9/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
7/27 = 7 × 10/27 × 10 = 70/270 - Subtract the two like fractions:
9/270 - 70/270 = 9 - 70/270 = -61/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90-7/27 3/90-14/27 3/90-7/54 9/90-7/27 3/90-21/27 3/90-7/81 15/90-7/27 3/90-35/27 21/90-7/27 3/90-49/27