Subtract 42/25 from 20/15
1st number: 1 5/15, 2nd number: 1 17/25
20/15 - 42/25 is -26/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 25 is 75
Next, find the equivalent fraction of both fractional numbers with denominator 75 - For the 1st fraction, since 15 × 5 = 75,
20/15 = 20 × 5/15 × 5 = 100/75 - Likewise, for the 2nd fraction, since 25 × 3 = 75,
42/25 = 42 × 3/25 × 3 = 126/75 - Subtract the two like fractions:
100/75 - 126/75 = 100 - 126/75 = -26/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-42/25 20/15-84/25 20/30-42/25 20/15-42/50 60/15-42/25 20/45-42/25 20/15-42/75 20/75-42/25