Subtract 1/24 from 42/21
1st number: 2 0/21, 2nd number: 1/24
42/21 - 1/24 is 47/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
42/21 = 42 × 8/21 × 8 = 336/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
1/24 = 1 × 7/24 × 7 = 7/168 - Subtract the two like fractions:
336/168 - 7/168 = 336 - 7/168 = 329/168 - After reducing the fraction, the answer is 47/24
- In mixed form: 123/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21-1/24 42/21-2/24 42/21-1/48 42/21-3/24 42/63-1/24 42/21-1/72 42/21-5/24 42/21-7/24