Subtract 35/7 from 21/24
1st number: 21/24, 2nd number: 5 0/7
21/24 - 35/7 is -33/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 7 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Likewise, for the 2nd fraction, since 7 × 24 = 168,
35/7 = 35 × 24/7 × 24 = 840/168 - Subtract the two like fractions:
147/168 - 840/168 = 147 - 840/168 = -693/168 - After reducing the fraction, the answer is -33/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-35/7 21/24-70/7 21/48-35/7 21/24-35/14 63/24-35/7 21/72-35/7 21/24-35/21 21/24-35/49