Subtract 4/7 from 12/42
12/42 - 4/7 is -2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
12/42 = 12 × 1/42 × 1 = 12/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
4/7 = 4 × 6/7 × 6 = 24/42 - Subtract the two like fractions:
12/42 - 24/42 = 12 - 24/42 = -12/42 - After reducing the fraction, the answer is -2/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-4/7 12/42-8/7 12/84-4/7 12/42-4/14 36/42-4/7 12/42-12/7 12/42-4/21 60/42-4/7 12/42-20/7 12/42-4/35 84/42-4/7 12/42-28/7 12/42-4/49