Subtract 12/30 from 3/8
3/8 - 12/30 is -1/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
3/8 = 3 × 15/8 × 15 = 45/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
12/30 = 12 × 4/30 × 4 = 48/120 - Subtract the two like fractions:
45/120 - 48/120 = 45 - 48/120 = -3/120 - After reducing the fraction, the answer is -1/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/8-12/30 3/8-24/30 3/16-12/30 3/8-12/60 9/8-12/30 3/8-36/30 3/24-12/30 3/8-12/90 15/8-12/30 3/8-60/30 3/40-12/30 21/8-12/30 3/8-84/30 3/56-12/30