Subtract 20/28 from 1/45
1/45 - 20/28 is -218/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 45 × 28 = 1260,
1/45 = 1 × 28/45 × 28 = 28/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
20/28 = 20 × 45/28 × 45 = 900/1260 - Subtract the two like fractions:
28/1260 - 900/1260 = 28 - 900/1260 = -872/1260 - After reducing the fraction, the answer is -218/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/45-20/28 1/45-40/28 1/90-20/28 1/45-20/56 3/45-20/28 1/45-60/28 1/45-20/84 5/45-20/28 7/45-20/28