Subtract 18/8 from 54/30
1st number: 1 24/30, 2nd number: 2 2/8
54/30 - 18/8 is -9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
54/30 = 54 × 4/30 × 4 = 216/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
18/8 = 18 × 15/8 × 15 = 270/120 - Subtract the two like fractions:
216/120 - 270/120 = 216 - 270/120 = -54/120 - After reducing the fraction, the answer is -9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30-36/8 54/60-18/8 54/30-18/16 54/30-54/8 54/90-18/8 54/30-18/24 54/30-90/8 54/30-18/40 54/30-18/56