Subtract 28/8 from 80/70
1st number: 1 10/70, 2nd number: 3 4/8
80/70 - 28/8 is -33/14.
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,
80/70 = 80 × 4/70 × 4 = 320/280 - Likewise, for the 2nd fraction, since 8 × 35 = 280,
28/8 = 28 × 35/8 × 35 = 980/280 - Subtract the two like fractions:
320/280 - 980/280 = 320 - 980/280 = -660/280 - After reducing the fraction, the answer is -33/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70-56/8 80/70-28/16 80/70-84/8 80/70-28/24 80/70-28/40 80/70-28/56