Subtract 7/10 from 1/42
1/42 - 7/10 is -71/105.
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,
1/42 = 1 × 5/42 × 5 = 5/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210 - Subtract the two like fractions:
5/210 - 147/210 = 5 - 147/210 = -142/210 - After reducing the fraction, the answer is -71/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42-7/10 1/42-14/10 1/84-7/10 1/42-7/20 3/42-7/10 1/42-21/10 1/42-7/30 5/42-7/10 1/42-35/10 1/42-7/50 7/42-7/10 1/42-49/10 1/42-7/70