Subtract 3/10 from 18/40
18/40 - 3/10 is 3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 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 10 × 4 = 40,
3/10 = 3 × 4/10 × 4 = 12/40 - Subtract the two like fractions:
18/40 - 12/40 = 18 - 12/40 = 6/40 - After reducing the fraction, the answer is 3/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40-3/10 18/40-6/10 18/80-3/10 18/40-3/20 54/40-3/10 18/40-9/10 18/40-3/30 90/40-3/10 18/40-15/10 18/40-3/50 18/40-21/10 18/40-3/70