Subtract 42/70 from 1/5
1/5 - 42/70 is -2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 5 × 14 = 70,
1/5 = 1 × 14/5 × 14 = 14/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
42/70 = 42 × 1/70 × 1 = 42/70 - Subtract the two like fractions:
14/70 - 42/70 = 14 - 42/70 = -28/70 - After reducing the fraction, the answer is -2/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5-42/70 1/5-84/70 1/10-42/70 3/5-42/70 1/15-42/70 1/25-42/70 7/5-42/70 1/35-42/70