Subtract 21/70 from 1/24
1/24 - 21/70 is -31/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 70 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 24 × 35 = 840,
1/24 = 1 × 35/24 × 35 = 35/840 - Likewise, for the 2nd fraction, since 70 × 12 = 840,
21/70 = 21 × 12/70 × 12 = 252/840 - Subtract the two like fractions:
35/840 - 252/840 = 35 - 252/840 = -217/840 - After reducing the fraction, the answer is -31/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/24-21/70 1/24-42/70 1/48-21/70 3/24-21/70 1/24-63/70 1/72-21/70 5/24-21/70 7/24-21/70