Subtract 40/5 from 15/54
1st number: 15/54, 2nd number: 8 0/5
15/54 - 40/5 is -139/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 5 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
15/54 = 15 × 5/54 × 5 = 75/270 - Likewise, for the 2nd fraction, since 5 × 54 = 270,
40/5 = 40 × 54/5 × 54 = 2160/270 - Subtract the two like fractions:
75/270 - 2160/270 = 75 - 2160/270 = -2085/270 - After reducing the fraction, the answer is -139/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/54-40/5 15/54-80/5 15/54-40/10 45/54-40/5 15/54-40/15 75/54-40/5 15/54-40/25 15/54-40/35