Subtract 1/36 from 21/27
21/27 - 1/36 is 3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 36 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 27 × 4 = 108,
21/27 = 21 × 4/27 × 4 = 84/108 - Likewise, for the 2nd fraction, since 36 × 3 = 108,
1/36 = 1 × 3/36 × 3 = 3/108 - Subtract the two like fractions:
84/108 - 3/108 = 84 - 3/108 = 81/108 - After reducing the fraction, the answer is 3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27-1/36 21/27-2/36 21/54-1/36 21/27-1/72 63/27-1/36 21/27-3/36 21/81-1/36 21/27-5/36 21/27-7/36