Subtract 4/8 from 15/21
1521 - 48 is 314.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
1521 = 15 × 821 × 8 = 120168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
48 = 4 × 218 × 21 = 84168 - Subtract the two like fractions:
120168 - 84168 = 120 - 84168 = 36168 - After reducing the fraction, the answer is 314
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21-4/8 15/42-4/8 15/21-4/16 45/21-4/8 15/21-12/8 15/63-4/8 15/21-4/24 75/21-4/8 15/21-20/8 15/21-4/40 15/21-28/8 15/21-4/56