Subtract 7/84 from 30/15
1st number: 2 0/15, 2nd number: 7/84
30/15 - 7/84 is 23/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
30/15 = 30 × 28/15 × 28 = 840/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
7/84 = 7 × 5/84 × 5 = 35/420 - Subtract the two like fractions:
840/420 - 35/420 = 840 - 35/420 = 805/420 - After reducing the fraction, the answer is 23/12
- In mixed form: 111/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15-7/84 30/15-14/84 90/15-7/84 30/15-21/84 30/45-7/84 30/15-35/84 30/75-7/84 30/15-49/84