Subtract 5/10 from 12/42
12/42 - 5/10 is -3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
12/42 = 12 × 5/42 × 5 = 60/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
5/10 = 5 × 21/10 × 21 = 105/210 - Subtract the two like fractions:
60/210 - 105/210 = 60 - 105/210 = -45/210 - After reducing the fraction, the answer is -3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-5/10 12/84-5/10 12/42-5/20 36/42-5/10 12/42-15/10 12/42-5/30 60/42-5/10 12/42-25/10 12/42-5/50 84/42-5/10 12/42-35/10 12/42-5/70