Subtract 7/8 from 4/30
4/30 - 7/8 is -89/120.
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,
4/30 = 4 × 4/30 × 4 = 16/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
7/8 = 7 × 15/8 × 15 = 105/120 - Subtract the two like fractions:
16/120 - 105/120 = 16 - 105/120 = -89/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/30-7/8 4/30-14/8 4/60-7/8 4/30-7/16 12/30-7/8 4/30-21/8 4/90-7/8 4/30-7/24 20/30-7/8 4/30-35/8 4/30-7/40 28/30-7/8 4/30-49/8 4/30-7/56