Subtract 30/9 from 7/84
1st number: 7/84, 2nd number: 3 3/9
7/84 - 30/9 is -13/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
7/84 = 7 × 3/84 × 3 = 21/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
30/9 = 30 × 28/9 × 28 = 840/252 - Subtract the two like fractions:
21/252 - 840/252 = 21 - 840/252 = -819/252 - After reducing the fraction, the answer is -13/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-30/9 7/84-60/9 7/84-30/18 21/84-30/9 7/84-90/9 7/84-30/27 35/84-30/9 7/84-30/45 49/84-30/9 7/84-30/63