Subtract 40/7 from 12/15
1st number: 12/15, 2nd number: 5 5/7
12/15 - 40/7 is -172/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
12/15 = 12 × 7/15 × 7 = 84/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
40/7 = 40 × 15/7 × 15 = 600/105 - Subtract the two like fractions:
84/105 - 600/105 = 84 - 600/105 = -516/105 - After reducing the fraction, the answer is -172/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15-40/7 12/15-80/7 12/30-40/7 12/15-40/14 36/15-40/7 12/45-40/7 12/15-40/21 60/15-40/7 12/75-40/7 12/15-40/35 84/15-40/7 12/15-40/49