Subtract 35/20 from 18/40
1st number: 18/40, 2nd number: 1 15/20
18/40 - 35/20 is -13/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
18/40 = 18 × 1/40 × 1 = 18/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
35/20 = 35 × 2/20 × 2 = 70/40 - Subtract the two like fractions:
18/40 - 70/40 = 18 - 70/40 = -52/40 - After reducing the fraction, the answer is -13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40-35/20 18/40-70/20 18/80-35/20 18/40-35/40 54/40-35/20 18/40-35/60 90/40-35/20