Subtract 49/8 from 84/42
1st number: 2 0/42, 2nd number: 6 1/8
84/42 - 49/8 is -33/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
84/42 = 84 × 4/42 × 4 = 336/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
49/8 = 49 × 21/8 × 21 = 1029/168 - Subtract the two like fractions:
336/168 - 1029/168 = 336 - 1029/168 = -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: 84/42-98/8 84/42-49/16 84/42-49/24 84/42-49/40 84/42-49/56