Subtract 20/30 from 49/21
1st number: 2 7/21, 2nd number: 20/30
49/21 - 20/30 is 5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
49/21 = 49 × 10/21 × 10 = 490/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
20/30 = 20 × 7/30 × 7 = 140/210 - Subtract the two like fractions:
490/210 - 140/210 = 490 - 140/210 = 350/210 - After reducing the fraction, the answer is 5/3
- In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21-20/30 49/21-40/30 49/42-20/30 49/21-20/60 49/21-60/30 49/63-20/30 49/21-20/90