Subtract 20/63 from 49/21
1st number: 2 7/21, 2nd number: 20/63
49/21 - 20/63 is 127/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
49/21 = 49 × 3/21 × 3 = 147/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
20/63 = 20 × 1/63 × 1 = 20/63 - Subtract the two like fractions:
147/63 - 20/63 = 147 - 20/63 = 127/63 - In mixed form: 21/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21-20/63 49/21-40/63 49/42-20/63 49/21-60/63 49/63-20/63