Subtract 9/20 from 5/70
5/70 - 9/20 is -53/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
5/70 = 5 × 2/70 × 2 = 10/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
9/20 = 9 × 7/20 × 7 = 63/140 - Subtract the two like fractions:
10/140 - 63/140 = 10 - 63/140 = -53/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/70-9/20 5/70-18/20 5/70-9/40 15/70-9/20 5/70-27/20 5/70-9/60 25/70-9/20 5/70-45/20 35/70-9/20 5/70-63/20