Subtract 28/40 from 6/15
6/15 - 28/40 is -3/10.
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,
6/15 = 6 × 8/15 × 8 = 48/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
28/40 = 28 × 3/40 × 3 = 84/120 - Subtract the two like fractions:
48/120 - 84/120 = 48 - 84/120 = -36/120 - After reducing the fraction, the answer is -3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/15-28/40 6/15-56/40 6/30-28/40 6/15-28/80 18/15-28/40 6/15-84/40 6/45-28/40 30/15-28/40 6/75-28/40 42/15-28/40