Subtract 12/20 from 35/70
35/70 - 12/20 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
35/70 = 35 × 2/70 × 2 = 70/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
12/20 = 12 × 7/20 × 7 = 84/140 - Subtract the two like fractions:
70/140 - 84/140 = 70 - 84/140 = -14/140 - 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: 35/70-24/20 35/70-12/40 35/70-36/20 35/70-12/60 35/70-60/20 35/70-84/20