Subtract 54/6 from 49/21
1st number: 2 7/21, 2nd number: 9 0/6
49/21 - 54/6 is -20/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
49/21 = 49 × 2/21 × 2 = 98/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
54/6 = 54 × 7/6 × 7 = 378/42 - Subtract the two like fractions:
98/42 - 378/42 = 98 - 378/42 = -280/42 - After reducing the fraction, the answer is -20/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21-54/6 49/42-54/6 49/21-54/12 49/63-54/6 49/21-54/18 49/21-54/30 49/21-54/42