Subtract 21/36 from 9/8
1st number: 1 1/8, 2nd number: 21/36
9/8 - 21/36 is 13/24.
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,
9/8 = 9 × 9/8 × 9 = 81/72 - Likewise, for the 2nd fraction, since 36 × 2 = 72,
21/36 = 21 × 2/36 × 2 = 42/72 - Subtract the two like fractions:
81/72 - 42/72 = 81 - 42/72 = 39/72 - 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: 18/8-21/36 9/8-42/36 9/16-21/36 9/8-21/72 27/8-21/36 9/8-63/36 9/24-21/36 45/8-21/36 9/40-21/36 63/8-21/36 9/56-21/36