Subtract 63/21 from 1/54
1st number: 1/54, 2nd number: 3 0/21
1/54 - 63/21 is -161/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
1/54 = 1 × 7/54 × 7 = 7/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
63/21 = 63 × 18/21 × 18 = 1134/378 - Subtract the two like fractions:
7/378 - 1134/378 = 7 - 1134/378 = -1127/378 - After reducing the fraction, the answer is -161/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/54-63/21 1/54-63/42 3/54-63/21 5/54-63/21 7/54-63/21