Subtract 12/30 from 3/7
3/7 - 12/30 is 1/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
3/7 = 3 × 30/7 × 30 = 90/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
12/30 = 12 × 7/30 × 7 = 84/210 - Subtract the two like fractions:
90/210 - 84/210 = 90 - 84/210 = 6/210 - After reducing the fraction, the answer is 1/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-12/30 3/7-24/30 3/14-12/30 3/7-12/60 9/7-12/30 3/7-36/30 3/21-12/30 3/7-12/90 15/7-12/30 3/7-60/30 3/35-12/30 21/7-12/30 3/7-84/30 3/49-12/30