Subtract 4/8 from 28/70
28/70 - 4/8 is -1/10.
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,
28/70 = 28 × 4/70 × 4 = 112/280 - Likewise, for the 2nd fraction, since 8 × 35 = 280,
4/8 = 4 × 35/8 × 35 = 140/280 - Subtract the two like fractions:
112/280 - 140/280 = 112 - 140/280 = -28/280 - After reducing the fraction, the answer is -1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70-4/8 28/70-4/16 84/70-4/8 28/70-12/8 28/70-4/24 28/70-20/8 28/70-4/40 28/70-28/8 28/70-4/56