Subtract 18/40 from 42/3
1st number: 14 0/3, 2nd number: 18/40
42/3 - 18/40 is 271/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 3 × 40 = 120,
42/3 = 42 × 40/3 × 40 = 1680/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
18/40 = 18 × 3/40 × 3 = 54/120 - Subtract the two like fractions:
1680/120 - 54/120 = 1680 - 54/120 = 1626/120 - After reducing the fraction, the answer is 271/20
- In mixed form: 1311/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/3-18/40 42/3-36/40 42/6-18/40 42/3-18/80 42/3-54/40 42/9-18/40 42/3-90/40 42/15-18/40 42/21-18/40