Subtract 8/45 from 4/30
4/30 - 8/45 is -2/45.
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,
4/30 = 4 × 3/30 × 3 = 12/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
8/45 = 8 × 2/45 × 2 = 16/90 - Subtract the two like fractions:
12/90 - 16/90 = 12 - 16/90 = -4/90 - After reducing the fraction, the answer is -2/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/30-8/45 4/30-16/45 4/60-8/45 4/30-8/90 12/30-8/45 4/30-24/45 4/90-8/45 20/30-8/45 4/30-40/45 28/30-8/45 4/30-56/45