Subtract 12/20 from 28/35
28/35 - 12/20 is 1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
28/35 = 28 × 4/35 × 4 = 112/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
12/20 = 12 × 7/20 × 7 = 84/140 - Subtract the two like fractions:
112/140 - 84/140 = 112 - 84/140 = 28/140 - After reducing the fraction, the answer is 1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/35-12/20 28/35-24/20 28/70-12/20 28/35-12/40 84/35-12/20 28/35-36/20 28/35-12/60 28/35-60/20 28/35-84/20