Subtract 42/10 from 18/70
1st number: 18/70, 2nd number: 4 2/10
18/70 - 42/10 is -138/35.
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,
18/70 = 18 × 1/70 × 1 = 18/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
42/10 = 42 × 7/10 × 7 = 294/70 - Subtract the two like fractions:
18/70 - 294/70 = 18 - 294/70 = -276/70 - After reducing the fraction, the answer is -138/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70-42/10 18/70-84/10 18/70-42/20 54/70-42/10 18/70-42/30 90/70-42/10 18/70-42/50 18/70-42/70