Subtract 70/8 from 18/70
1st number: 18/70, 2nd number: 8 6/8
18/70 - 70/8 is -1189/140.
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,
18/70 = 18 × 4/70 × 4 = 72/280 - Likewise, for the 2nd fraction, since 8 × 35 = 280,
70/8 = 70 × 35/8 × 35 = 2450/280 - Subtract the two like fractions:
72/280 - 2450/280 = 72 - 2450/280 = -2378/280 - After reducing the fraction, the answer is -1189/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70-70/8 18/70-70/16 54/70-70/8 18/70-70/24 90/70-70/8 18/70-70/40 18/70-70/56