Subtract 20/21 from 49/9
1st number: 5 4/9, 2nd number: 20/21
49/9 - 20/21 is 283/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
49/9 = 49 × 7/9 × 7 = 343/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
20/21 = 20 × 3/21 × 3 = 60/63 - Subtract the two like fractions:
343/63 - 60/63 = 343 - 60/63 = 283/63 - In mixed form: 431/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/9-20/21 49/9-40/21 49/18-20/21 49/9-20/42 49/9-60/21 49/27-20/21 49/9-20/63 49/45-20/21 49/63-20/21