Subtract 7/10 from 42/70
42/70 - 7/10 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
42/70 = 42 × 1/70 × 1 = 42/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
7/10 = 7 × 7/10 × 7 = 49/70 - Subtract the two like fractions:
42/70 - 49/70 = 42 - 49/70 = -7/70 - After reducing the fraction, the answer is -1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70-7/10 42/70-14/10 42/70-7/20 42/70-21/10 42/70-7/30 42/70-35/10 42/70-7/50 42/70-49/10 42/70-7/70