Subtract 21/48 from 1/30
1/30 - 21/48 is -97/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
1/30 = 1 × 8/30 × 8 = 8/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240 - Subtract the two like fractions:
8/240 - 105/240 = 8 - 105/240 = -97/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30-21/48 1/30-42/48 1/60-21/48 1/30-21/96 3/30-21/48 1/30-63/48 1/90-21/48 5/30-21/48 7/30-21/48