Subtract 20/6 from 28/45
1st number: 28/45, 2nd number: 3 2/6
28/45 - 20/6 is -122/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 6 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
28/45 = 28 × 2/45 × 2 = 56/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
20/6 = 20 × 15/6 × 15 = 300/90 - Subtract the two like fractions:
56/90 - 300/90 = 56 - 300/90 = -244/90 - After reducing the fraction, the answer is -122/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/45-20/6 28/45-40/6 28/90-20/6 28/45-20/12 84/45-20/6 28/45-60/6 28/45-20/18 28/45-20/30 28/45-20/42