Subtract 1/21 from 45/48
45/48 - 1/21 is 299/336.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 48 × 7 = 336,
45/48 = 45 × 7/48 × 7 = 315/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
1/21 = 1 × 16/21 × 16 = 16/336 - Subtract the two like fractions:
315/336 - 16/336 = 315 - 16/336 = 299/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/48-1/21 45/48-2/21 45/96-1/21 45/48-1/42 45/48-3/21 45/48-1/63 45/48-5/21 45/48-7/21