Subtract 18/12 from 7/70
1st number: 7/70, 2nd number: 1 6/12
7/70 - 18/12 is -7/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
7/70 = 7 × 6/70 × 6 = 42/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
18/12 = 18 × 35/12 × 35 = 630/420 - Subtract the two like fractions:
42/420 - 630/420 = 42 - 630/420 = -588/420 - After reducing the fraction, the answer is -7/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70-18/12 7/70-36/12 7/70-18/24 21/70-18/12 7/70-54/12 7/70-18/36 35/70-18/12 7/70-90/12 7/70-18/60 49/70-18/12 7/70-18/84