Subtract 21/8 from 24/84
1st number: 24/84, 2nd number: 2 5/8
24/84 - 21/8 is -131/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
24/84 = 24 × 2/84 × 2 = 48/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
21/8 = 21 × 21/8 × 21 = 441/168 - Subtract the two like fractions:
48/168 - 441/168 = 48 - 441/168 = -393/168 - After reducing the fraction, the answer is -131/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/84-21/8 24/84-42/8 24/84-21/16 72/84-21/8 24/84-63/8 24/84-21/24 24/84-21/40 24/84-21/56