Subtract 1/54 from 21/27
21/27 - 1/54 is 41/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 27 × 2 = 54,
21/27 = 21 × 2/27 × 2 = 42/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
1/54 = 1 × 1/54 × 1 = 1/54 - Subtract the two like fractions:
42/54 - 1/54 = 42 - 1/54 = 41/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27-1/54 21/27-2/54 21/54-1/54 63/27-1/54 21/27-3/54 21/81-1/54 21/27-5/54 21/27-7/54