Subtract 20/15 from 42/4
1st number: 10 2/4, 2nd number: 1 5/15
42/4 - 20/15 is 55/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
42/4 = 42 × 15/4 × 15 = 630/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
20/15 = 20 × 4/15 × 4 = 80/60 - Subtract the two like fractions:
630/60 - 80/60 = 630 - 80/60 = 550/60 - After reducing the fraction, the answer is 55/6
- In mixed form: 91/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-20/15 42/4-40/15 42/8-20/15 42/4-20/30 42/4-60/15 42/12-20/15 42/4-20/45 42/20-20/15 42/4-20/75 42/28-20/15