Subtract 30/6 from 8/21
1st number: 8/21, 2nd number: 5 0/6
8/21 - 30/6 is -97/21.
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,
8/21 = 8 × 2/21 × 2 = 16/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
30/6 = 30 × 7/6 × 7 = 210/42 - Subtract the two like fractions:
16/42 - 210/42 = 16 - 210/42 = -194/42 - After reducing the fraction, the answer is -97/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21-30/6 8/21-60/6 8/42-30/6 8/21-30/12 24/21-30/6 8/21-90/6 8/63-30/6 8/21-30/18 40/21-30/6 56/21-30/6 8/21-30/42