Subtract 1/15 from 24/21
1st number: 1 3/21, 2nd number: 1/15
24/21 - 1/15 is 113/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
24/21 = 24 × 5/21 × 5 = 120/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
1/15 = 1 × 7/15 × 7 = 7/105 - Subtract the two like fractions:
120/105 - 7/105 = 120 - 7/105 = 113/105 - In mixed form: 18/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21-1/15 24/21-2/15 24/42-1/15 24/21-1/30 72/21-1/15 24/21-3/15 24/63-1/15 24/21-1/45 24/21-5/15 24/21-1/75 24/21-7/15