Subtract 54/10 from 18/40
1st number: 18/40, 2nd number: 5 4/10
18/40 - 54/10 is -99/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
18/40 = 18 × 1/40 × 1 = 18/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
54/10 = 54 × 4/10 × 4 = 216/40 - Subtract the two like fractions:
18/40 - 216/40 = 18 - 216/40 = -198/40 - After reducing the fraction, the answer is -99/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40-54/10 18/80-54/10 18/40-54/20 54/40-54/10 18/40-54/30 90/40-54/10 18/40-54/50 18/40-54/70