Subtract 21/8 from 84/49
1st number: 1 35/49, 2nd number: 2 5/8
84/49 - 21/8 is -51/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 8 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 49 × 8 = 392,
84/49 = 84 × 8/49 × 8 = 672/392 - Likewise, for the 2nd fraction, since 8 × 49 = 392,
21/8 = 21 × 49/8 × 49 = 1029/392 - Subtract the two like fractions:
672/392 - 1029/392 = 672 - 1029/392 = -357/392 - After reducing the fraction, the answer is -51/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/49-42/8 84/98-21/8 84/49-21/16 84/49-63/8 84/49-21/24 84/49-21/40 84/49-21/56