Subtract 49/8 from 90/70
1st number: 1 20/70, 2nd number: 6 1/8
90/70 - 49/8 is -271/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 8 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
90/70 = 90 × 4/70 × 4 = 360/280 - Likewise, for the 2nd fraction, since 8 × 35 = 280,
49/8 = 49 × 35/8 × 35 = 1715/280 - Subtract the two like fractions:
360/280 - 1715/280 = 360 - 1715/280 = -1355/280 - After reducing the fraction, the answer is -271/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70-98/8 90/70-49/16 90/70-49/24 90/70-49/40 90/70-49/56