Subtract 3/8 from 7/30
7/30 - 3/8 is -17/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
7/30 = 7 × 4/30 × 4 = 28/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
3/8 = 3 × 15/8 × 15 = 45/120 - Subtract the two like fractions:
28/120 - 45/120 = 28 - 45/120 = -17/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-3/8 7/30-6/8 7/60-3/8 7/30-3/16 21/30-3/8 7/30-9/8 7/90-3/8 7/30-3/24 35/30-3/8 7/30-15/8 7/30-3/40 49/30-3/8 7/30-21/8 7/30-3/56