Subtract 12/70 from 42/20
1st number: 2 2/20, 2nd number: 12/70
42/20 - 12/70 is 27/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
12/70 = 12 × 2/70 × 2 = 24/140 - Subtract the two like fractions:
294/140 - 24/140 = 294 - 24/140 = 270/140 - After reducing the fraction, the answer is 27/14
- In mixed form: 113/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-12/70 42/20-24/70 42/40-12/70 42/20-36/70 42/60-12/70 42/20-60/70 42/20-84/70