Subtract 12/4 from 4/42
1st number: 4/42, 2nd number: 3 0/4
4/42 - 12/4 is -61/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
4/42 = 4 × 2/42 × 2 = 8/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
12/4 = 12 × 21/4 × 21 = 252/84 - Subtract the two like fractions:
8/84 - 252/84 = 8 - 252/84 = -244/84 - After reducing the fraction, the answer is -61/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42-12/4 4/42-24/4 4/84-12/4 4/42-12/8 12/42-12/4 4/42-36/4 20/42-12/4 4/42-60/4 4/42-12/20 28/42-12/4 4/42-84/4 4/42-12/28