Subtract 30/27 from 12/84
1st number: 12/84, 2nd number: 1 3/27
12/84 - 30/27 is -61/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
12/84 = 12 × 9/84 × 9 = 108/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
30/27 = 30 × 28/27 × 28 = 840/756 - Subtract the two like fractions:
108/756 - 840/756 = 108 - 840/756 = -732/756 - After reducing the fraction, the answer is -61/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84-30/27 12/84-60/27 12/84-30/54 36/84-30/27 12/84-90/27 12/84-30/81 60/84-30/27