Subtract 12/15 from 5/84
5/84 - 12/15 is -311/420.
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,
5/84 = 5 × 5/84 × 5 = 25/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
12/15 = 12 × 28/15 × 28 = 336/420 - Subtract the two like fractions:
25/420 - 336/420 = 25 - 336/420 = -311/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/84-12/15 5/84-24/15 5/84-12/30 15/84-12/15 5/84-36/15 5/84-12/45 25/84-12/15 5/84-60/15 5/84-12/75 35/84-12/15 5/84-84/15