Subtract 15/70 from 1/30
1/30 - 15/70 is -19/105.
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,
15/70 = 15 × 3/70 × 3 = 45/210 - Subtract the two like fractions:
7/210 - 45/210 = 7 - 45/210 = -38/210 - After reducing the fraction, the answer is -19/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30-15/70 1/30-30/70 1/60-15/70 3/30-15/70 1/30-45/70 1/90-15/70 5/30-15/70 1/30-75/70 7/30-15/70