Subtract 15/63 from 21/9
1st number: 2 3/9, 2nd number: 15/63
21/9 - 15/63 is 44/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
21/9 = 21 × 7/9 × 7 = 147/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
15/63 = 15 × 1/63 × 1 = 15/63 - Subtract the two like fractions:
147/63 - 15/63 = 147 - 15/63 = 132/63 - After reducing the fraction, the answer is 44/21
- In mixed form: 22/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9-15/63 21/9-30/63 21/18-15/63 63/9-15/63 21/9-45/63 21/27-15/63 21/9-75/63 21/45-15/63 21/63-15/63