Subtract 42/15 from 50/28
1st number: 1 22/28, 2nd number: 2 12/15
50/28 - 42/15 is -71/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
50/28 = 50 × 15/28 × 15 = 750/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
42/15 = 42 × 28/15 × 28 = 1176/420 - Subtract the two like fractions:
750/420 - 1176/420 = 750 - 1176/420 = -426/420 - After reducing the fraction, the answer is -71/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/28-84/15 50/56-42/15 50/28-42/30 50/84-42/15 50/28-42/45 50/28-42/75