Subtract 12/70 from 7/30
7/30 - 12/70 is 13/210.
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,
7/30 = 7 × 7/30 × 7 = 49/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Subtract the two like fractions:
49/210 - 36/210 = 49 - 36/210 = 13/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-12/70 7/30-24/70 7/60-12/70 21/30-12/70 7/30-36/70 7/90-12/70 35/30-12/70 7/30-60/70 49/30-12/70 7/30-84/70