Subtract 1/20 from 18/35
18/35 - 1/20 is 13/28.
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,
18/35 = 18 × 4/35 × 4 = 72/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
1/20 = 1 × 7/20 × 7 = 7/140 - Subtract the two like fractions:
72/140 - 7/140 = 72 - 7/140 = 65/140 - After reducing the fraction, the answer is 13/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/35-1/20 18/35-2/20 18/70-1/20 18/35-1/40 54/35-1/20 18/35-3/20 18/35-1/60 90/35-1/20 18/35-5/20 18/35-7/20