Subtract 40/15 from 42/2
1st number: 21 0/2, 2nd number: 2 10/15
42/2 - 40/15 is 55/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
42/2 = 42 × 15/2 × 15 = 630/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
40/15 = 40 × 2/15 × 2 = 80/30 - Subtract the two like fractions:
630/30 - 80/30 = 630 - 80/30 = 550/30 - After reducing the fraction, the answer is 55/3
- In mixed form: 181/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-40/15 42/2-80/15 42/4-40/15 42/2-40/30 42/6-40/15 42/2-40/45 42/10-40/15 42/2-40/75 42/14-40/15