Subtract 20/25 from 12/28
12/28 - 20/25 is -13/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 25 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 28 × 25 = 700,
12/28 = 12 × 25/28 × 25 = 300/700 - Likewise, for the 2nd fraction, since 25 × 28 = 700,
20/25 = 20 × 28/25 × 28 = 560/700 - Subtract the two like fractions:
300/700 - 560/700 = 300 - 560/700 = -260/700 - After reducing the fraction, the answer is -13/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/28-20/25 12/28-40/25 12/56-20/25 12/28-20/50 36/28-20/25 12/28-60/25 12/84-20/25 12/28-20/75 60/28-20/25 84/28-20/25