Subtract 18/80 from 4/30
4/30 - 18/80 is -11/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
4/30 = 4 × 8/30 × 8 = 32/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
18/80 = 18 × 3/80 × 3 = 54/240 - Subtract the two like fractions:
32/240 - 54/240 = 32 - 54/240 = -22/240 - After reducing the fraction, the answer is -11/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/30-18/80 4/30-36/80 4/60-18/80 12/30-18/80 4/30-54/80 4/90-18/80 20/30-18/80 4/30-90/80 28/30-18/80