Subtract 21/45 from 1/24
1/24 - 21/45 is -17/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
1/24 = 1 × 15/24 × 15 = 15/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Subtract the two like fractions:
15/360 - 168/360 = 15 - 168/360 = -153/360 - After reducing the fraction, the answer is -17/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/24-21/45 1/24-42/45 1/48-21/45 1/24-21/90 3/24-21/45 1/24-63/45 1/72-21/45 5/24-21/45 7/24-21/45