Subtract 21/54 from 21/40
21/40 - 21/54 is 49/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 54 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
21/40 = 21 × 27/40 × 27 = 567/1080 - Likewise, for the 2nd fraction, since 54 × 20 = 1080,
21/54 = 21 × 20/54 × 20 = 420/1080 - Subtract the two like fractions:
567/1080 - 420/1080 = 567 - 420/1080 = 147/1080 - After reducing the fraction, the answer is 49/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40-21/54 21/40-42/54 21/80-21/54 63/40-21/54 21/40-63/54