Subtract 1/8 from 20/30
20/30 - 1/8 is 13/24.
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,
20/30 = 20 × 4/30 × 4 = 80/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
1/8 = 1 × 15/8 × 15 = 15/120 - Subtract the two like fractions:
80/120 - 15/120 = 80 - 15/120 = 65/120 - After reducing the fraction, the answer is 13/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30-1/8 20/30-2/8 20/60-1/8 20/30-1/16 60/30-1/8 20/30-3/8 20/90-1/8 20/30-1/24 20/30-5/8 20/30-1/40 20/30-7/8 20/30-1/56