Subtract 50/21 from 3/15
1st number: 3/15, 2nd number: 2 8/21
3/15 - 50/21 is -229/105.
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,
3/15 = 3 × 7/15 × 7 = 21/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
50/21 = 50 × 5/21 × 5 = 250/105 - Subtract the two like fractions:
21/105 - 250/105 = 21 - 250/105 = -229/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15-50/21 3/30-50/21 3/15-50/42 9/15-50/21 3/45-50/21 3/15-50/63 3/75-50/21 21/15-50/21