Subtract 2/15 from 21/8
1st number: 2 5/8, 2nd number: 2/15
21/8 - 2/15 is 299/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
21/8 = 21 × 15/8 × 15 = 315/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
2/15 = 2 × 8/15 × 8 = 16/120 - Subtract the two like fractions:
315/120 - 16/120 = 315 - 16/120 = 299/120 - In mixed form: 259/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8-2/15 21/8-4/15 21/16-2/15 21/8-2/30 63/8-2/15 21/8-6/15 21/24-2/15 21/8-2/45 21/8-10/15 21/40-2/15 21/8-2/75 21/8-14/15 21/56-2/15