Subtract 7/42 from 4/30
4/30 - 7/42 is -1/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
4/30 = 4 × 7/30 × 7 = 28/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Subtract the two like fractions:
28/210 - 35/210 = 28 - 35/210 = -7/210 - After reducing the fraction, the answer is -1/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/30-7/42 4/30-14/42 4/60-7/42 4/30-7/84 12/30-7/42 4/30-21/42 4/90-7/42 20/30-7/42 4/30-35/42 28/30-7/42 4/30-49/42