Subtract 15/7 from 4/20
1st number: 4/20, 2nd number: 2 1/7
4/20 - 15/7 is -68/35.
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,
4/20 = 4 × 7/20 × 7 = 28/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
15/7 = 15 × 20/7 × 20 = 300/140 - Subtract the two like fractions:
28/140 - 300/140 = 28 - 300/140 = -272/140 - After reducing the fraction, the answer is -68/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-15/7 4/20-30/7 4/40-15/7 4/20-15/14 12/20-15/7 4/20-45/7 4/60-15/7 4/20-15/21 4/20-75/7 4/20-15/35 28/20-15/7 4/20-15/49