Subtract 10/15 from 7/84
7/84 - 10/15 is -7/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 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 15 × 28 = 420,
10/15 = 10 × 28/15 × 28 = 280/420 - Subtract the two like fractions:
35/420 - 280/420 = 35 - 280/420 = -245/420 - After reducing the fraction, the answer is -7/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-10/15 7/84-20/15 7/84-10/30 21/84-10/15 7/84-30/15 7/84-10/45 35/84-10/15 7/84-50/15 7/84-10/75 49/84-10/15 7/84-70/15