Subtract 7/15 from 84/21
1st number: 4 0/21, 2nd number: 7/15
84/21 - 7/15 is 53/15.
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,
84/21 = 84 × 5/21 × 5 = 420/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
7/15 = 7 × 7/15 × 7 = 49/105 - Subtract the two like fractions:
420/105 - 49/105 = 420 - 49/105 = 371/105 - After reducing the fraction, the answer is 53/15
- In mixed form: 38/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21-14/15 84/42-7/15 84/21-7/30 84/21-21/15 84/63-7/15 84/21-7/45 84/21-35/15 84/21-7/75 84/21-49/15