Subtract 45/7 from 8/20
1st number: 8/20, 2nd number: 6 3/7
8/20 - 45/7 is -211/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
8/20 = 8 × 7/20 × 7 = 56/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
45/7 = 45 × 20/7 × 20 = 900/140 - Subtract the two like fractions:
56/140 - 900/140 = 56 - 900/140 = -844/140 - After reducing the fraction, the answer is -211/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20-45/7 8/20-90/7 8/40-45/7 8/20-45/14 24/20-45/7 8/60-45/7 8/20-45/21 40/20-45/7 8/20-45/35 56/20-45/7 8/20-45/49