Subtract 70/8 from 21/6
1st number: 3 3/6, 2nd number: 8 6/8
21/6 - 70/8 is -21/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 6 × 4 = 24,
21/6 = 21 × 4/6 × 4 = 84/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
70/8 = 70 × 3/8 × 3 = 210/24 - Subtract the two like fractions:
84/24 - 210/24 = 84 - 210/24 = -126/24 - After reducing the fraction, the answer is -21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-70/8 21/12-70/8 21/6-70/16 63/6-70/8 21/18-70/8 21/6-70/24 21/30-70/8 21/6-70/40 21/42-70/8 21/6-70/56