Subtract 12/15 from 36/84
36/84 - 12/15 is -13/35.
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,
36/84 = 36 × 5/84 × 5 = 180/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
12/15 = 12 × 28/15 × 28 = 336/420 - Subtract the two like fractions:
180/420 - 336/420 = 180 - 336/420 = -156/420 - After reducing the fraction, the answer is -13/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84-12/15 36/84-24/15 36/84-12/30 36/84-36/15 36/84-12/45 36/84-60/15 36/84-12/75 36/84-84/15