Subtract 8/70 from 1/30
1/30 - 8/70 is -17/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
8/70 = 8 × 3/70 × 3 = 24/210 - Subtract the two like fractions:
7/210 - 24/210 = 7 - 24/210 = -17/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30-8/70 1/30-16/70 1/60-8/70 3/30-8/70 1/30-24/70 1/90-8/70 5/30-8/70 1/30-40/70 7/30-8/70 1/30-56/70