Subtract 81/32 from 12/15
1st number: 12/15, 2nd number: 2 17/32
12/15 - 81/32 is -277/160.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 32 is 480
Next, find the equivalent fraction of both fractional numbers with denominator 480 - For the 1st fraction, since 15 × 32 = 480,
12/15 = 12 × 32/15 × 32 = 384/480 - Likewise, for the 2nd fraction, since 32 × 15 = 480,
81/32 = 81 × 15/32 × 15 = 1215/480 - Subtract the two like fractions:
384/480 - 1215/480 = 384 - 1215/480 = -831/480 - After reducing the fraction, the answer is -277/160
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15-81/32 12/30-81/32 12/15-81/64 36/15-81/32 12/45-81/32 12/15-81/96 60/15-81/32 12/75-81/32 84/15-81/32