Subtract 70/7 from 5/20
1st number: 5/20, 2nd number: 10 0/7
5/20 - 70/7 is -39/4.
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,
5/20 = 5 × 7/20 × 7 = 35/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
70/7 = 70 × 20/7 × 20 = 1400/140 - Subtract the two like fractions:
35/140 - 1400/140 = 35 - 1400/140 = -1365/140 - After reducing the fraction, the answer is -39/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20-70/7 5/40-70/7 5/20-70/14 15/20-70/7 5/60-70/7 5/20-70/21 25/20-70/7 5/20-70/35 35/20-70/7 5/20-70/49