Subtract 12/5 from 28/70
1st number: 28/70, 2nd number: 2 2/5
28/70 - 12/5 is -2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 5 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
28/70 = 28 × 1/70 × 1 = 28/70 - Likewise, for the 2nd fraction, since 5 × 14 = 70,
12/5 = 12 × 14/5 × 14 = 168/70 - Subtract the two like fractions:
28/70 - 168/70 = 28 - 168/70 = -140/70 - After reducing the fraction, the answer is -2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70-12/5 28/70-24/5 28/70-12/10 84/70-12/5 28/70-36/5 28/70-12/15 28/70-60/5 28/70-12/25 28/70-84/5 28/70-12/35