Subtract 36/21 from 4/15
1st number: 4/15, 2nd number: 1 15/21
4/15 - 36/21 is -152/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
4/15 = 4 × 7/15 × 7 = 28/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
36/21 = 36 × 5/21 × 5 = 180/105 - Subtract the two like fractions:
28/105 - 180/105 = 28 - 180/105 = -152/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/15-36/21 4/15-72/21 4/30-36/21 4/15-36/42 12/15-36/21 4/45-36/21 4/15-36/63 20/15-36/21 4/75-36/21 28/15-36/21