Subtract 28/45 from 1/30
1/30 - 28/45 is -53/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
1/30 = 1 × 3/30 × 3 = 3/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
28/45 = 28 × 2/45 × 2 = 56/90 - Subtract the two like fractions:
3/90 - 56/90 = 3 - 56/90 = -53/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30-28/45 1/30-56/45 1/60-28/45 1/30-28/90 3/30-28/45 1/30-84/45 1/90-28/45 5/30-28/45 7/30-28/45