Subtract 1/20 from 20/35
20/35 - 1/20 is 73/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
20/35 = 20 × 4/35 × 4 = 80/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
1/20 = 1 × 7/20 × 7 = 7/140 - Subtract the two like fractions:
80/140 - 7/140 = 80 - 7/140 = 73/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/35-1/20 20/35-2/20 20/70-1/20 20/35-1/40 60/35-1/20 20/35-3/20 20/35-1/60 20/35-5/20 20/35-7/20