Subtract 15/70 from 8/20
8/20 - 15/70 is 13/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 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 70 × 2 = 140,
15/70 = 15 × 2/70 × 2 = 30/140 - Subtract the two like fractions:
56/140 - 30/140 = 56 - 30/140 = 26/140 - After reducing the fraction, the answer is 13/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20-15/70 8/20-30/70 8/40-15/70 24/20-15/70 8/20-45/70 8/60-15/70 40/20-15/70 8/20-75/70 56/20-15/70