Subtract 20/45 from 3/28
3/28 - 20/45 is -85/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
3/28 = 3 × 45/28 × 45 = 135/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
20/45 = 20 × 28/45 × 28 = 560/1260 - Subtract the two like fractions:
135/1260 - 560/1260 = 135 - 560/1260 = -425/1260 - After reducing the fraction, the answer is -85/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28-20/45 3/28-40/45 3/56-20/45 3/28-20/90 9/28-20/45 3/28-60/45 3/84-20/45 15/28-20/45 21/28-20/45