Subtract 21/48 from 1/15
1/15 - 21/48 is -89/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
1/15 = 1 × 16/15 × 16 = 16/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240 - Subtract the two like fractions:
16/240 - 105/240 = 16 - 105/240 = -89/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15-21/48 1/15-42/48 1/30-21/48 1/15-21/96 3/15-21/48 1/15-63/48 1/45-21/48 5/15-21/48 1/75-21/48 7/15-21/48