Subtract 12/70 from 5/30
5/30 - 12/70 is -1/210.
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,
5/30 = 5 × 7/30 × 7 = 35/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Subtract the two like fractions:
35/210 - 36/210 = 35 - 36/210 = -1/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/30-12/70 5/30-24/70 5/60-12/70 15/30-12/70 5/30-36/70 5/90-12/70 25/30-12/70 5/30-60/70 35/30-12/70 5/30-84/70