Subtract 32/30 from 21/8
1st number: 2 5/8, 2nd number: 1 2/30
21/8 - 32/30 is 187/120.
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,
21/8 = 21 × 15/8 × 15 = 315/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
32/30 = 32 × 4/30 × 4 = 128/120 - Subtract the two like fractions:
315/120 - 128/120 = 315 - 128/120 = 187/120 - In mixed form: 167/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8-32/30 21/8-64/30 21/16-32/30 21/8-32/60 63/8-32/30 21/8-96/30 21/24-32/30 21/8-32/90 21/40-32/30 21/56-32/30