Subtract 7/21 from 15/4
1st number: 3 3/4, 2nd number: 7/21
154 - 721 is 4112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
154 = 15 × 214 × 21 = 31584 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
721 = 7 × 421 × 4 = 2884 - Subtract the two like fractions:
31584 - 2884 = 315 - 2884 = 28784 - After reducing the fraction, the answer is 4112
- In mixed form: 3512
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4-7/21 15/4-14/21 15/8-7/21 15/4-7/42 45/4-7/21 15/12-7/21 15/4-7/63 75/4-7/21 15/4-35/21 15/20-7/21 15/4-49/21 15/28-7/21