Subtract 56/54 from 90/21
1st number: 4 6/21, 2nd number: 1 2/54
90/21 - 56/54 is 614/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
90/21 = 90 × 18/21 × 18 = 1620/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
56/54 = 56 × 7/54 × 7 = 392/378 - Subtract the two like fractions:
1620/378 - 392/378 = 1620 - 392/378 = 1228/378 - After reducing the fraction, the answer is 614/189
- In mixed form: 347/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-56/54 90/63-56/54