Subtract 21/6 from 7/70
1st number: 7/70, 2nd number: 3 3/6
7/70 - 21/6 is -17/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 6 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
7/70 = 7 × 3/70 × 3 = 21/210 - Likewise, for the 2nd fraction, since 6 × 35 = 210,
21/6 = 21 × 35/6 × 35 = 735/210 - Subtract the two like fractions:
21/210 - 735/210 = 21 - 735/210 = -714/210 - After reducing the fraction, the answer is -17/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70-21/6 7/70-42/6 7/70-21/12 21/70-21/6 7/70-63/6 7/70-21/18 35/70-21/6 7/70-21/30 49/70-21/6 7/70-21/42