Subtract 6/70 from 7/42
7/42 - 6/70 is 17/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
6/70 = 6 × 3/70 × 3 = 18/210 - Subtract the two like fractions:
35/210 - 18/210 = 35 - 18/210 = 17/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42-6/70 7/42-12/70 7/84-6/70 21/42-6/70 7/42-18/70 35/42-6/70 7/42-30/70 49/42-6/70 7/42-42/70