Subtract 49/8 from 70/18
1st number: 3 16/18, 2nd number: 6 1/8
70/18 - 49/8 is -161/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
70/18 = 70 × 4/18 × 4 = 280/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
49/8 = 49 × 9/8 × 9 = 441/72 - Subtract the two like fractions:
280/72 - 441/72 = 280 - 441/72 = -161/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18-98/8 70/36-49/8 70/18-49/16 70/54-49/8 70/18-49/24 70/90-49/8 70/18-49/40 70/18-49/56