Subtract 30/21 from 2/54
1st number: 2/54, 2nd number: 1 9/21
2/54 - 30/21 is -263/189.
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,
2/54 = 2 × 7/54 × 7 = 14/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
30/21 = 30 × 18/21 × 18 = 540/378 - Subtract the two like fractions:
14/378 - 540/378 = 14 - 540/378 = -526/378 - After reducing the fraction, the answer is -263/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/54-30/21 2/54-60/21 2/54-30/42 6/54-30/21 2/54-90/21 2/54-30/63 10/54-30/21 14/54-30/21