Subtract 5/30 from 7/84
7/84 - 5/30 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
7/84 = 7 × 5/84 × 5 = 35/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
5/30 = 5 × 14/30 × 14 = 70/420 - Subtract the two like fractions:
35/420 - 70/420 = 35 - 70/420 = -35/420 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-5/30 7/84-10/30 7/84-5/60 21/84-5/30 7/84-15/30 7/84-5/90 35/84-5/30 7/84-25/30 49/84-5/30 7/84-35/30