Subtract 54/40 from 3/15
1st number: 3/15, 2nd number: 1 14/40
3/15 - 54/40 is -23/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
3/15 = 3 × 8/15 × 8 = 24/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
54/40 = 54 × 3/40 × 3 = 162/120 - Subtract the two like fractions:
24/120 - 162/120 = 24 - 162/120 = -138/120 - After reducing the fraction, the answer is -23/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15-54/40 3/30-54/40 3/15-54/80 9/15-54/40 3/45-54/40 3/75-54/40 21/15-54/40