Subtract 28/20 from 2/45
1st number: 2/45, 2nd number: 1 8/20
2/45 - 28/20 is -61/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
2/45 = 2 × 4/45 × 4 = 8/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
28/20 = 28 × 9/20 × 9 = 252/180 - Subtract the two like fractions:
8/180 - 252/180 = 8 - 252/180 = -244/180 - After reducing the fraction, the answer is -61/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/45-28/20 2/45-56/20 2/90-28/20 2/45-28/40 6/45-28/20 2/45-84/20 2/45-28/60 10/45-28/20 14/45-28/20