Subtract 12/8 from 35/42
1st number: 35/42, 2nd number: 1 4/8
35/42 - 12/8 is -2/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
35/42 = 35 × 4/42 × 4 = 140/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
12/8 = 12 × 21/8 × 21 = 252/168 - Subtract the two like fractions:
140/168 - 252/168 = 140 - 252/168 = -112/168 - After reducing the fraction, the answer is -2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42-12/8 35/42-24/8 35/84-12/8 35/42-12/16 35/42-36/8 35/42-12/24 35/42-60/8 35/42-12/40 35/42-84/8 35/42-12/56