Subtract 8/70 from 9/20
9/20 - 8/70 is 47/140.
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,
9/20 = 9 × 7/20 × 7 = 63/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
8/70 = 8 × 2/70 × 2 = 16/140 - Subtract the two like fractions:
63/140 - 16/140 = 63 - 16/140 = 47/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20-8/70 9/20-16/70 9/40-8/70 27/20-8/70 9/20-24/70 9/60-8/70 45/20-8/70 9/20-40/70 63/20-8/70 9/20-56/70