Subtract 32/36 from 21/8
1st number: 2 5/8, 2nd number: 32/36
21/8 - 32/36 is 125/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 36 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Likewise, for the 2nd fraction, since 36 × 2 = 72,
32/36 = 32 × 2/36 × 2 = 64/72 - Subtract the two like fractions:
189/72 - 64/72 = 189 - 64/72 = 125/72 - In mixed form: 153/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8-32/36 21/8-64/36 21/16-32/36 21/8-32/72 63/8-32/36 21/8-96/36 21/24-32/36 21/40-32/36 21/56-32/36