Subtract 25/20 from 42/15
1st number: 2 12/15, 2nd number: 1 5/20
42/15 - 25/20 is 31/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
42/15 = 42 × 4/15 × 4 = 168/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
25/20 = 25 × 3/20 × 3 = 75/60 - Subtract the two like fractions:
168/60 - 75/60 = 168 - 75/60 = 93/60 - After reducing the fraction, the answer is 31/20
- In mixed form: 111/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-25/20 42/15-50/20 42/30-25/20 42/15-25/40 42/15-75/20 42/45-25/20 42/15-25/60 42/75-25/20