Subtract 50/15 from 30/84
1st number: 30/84, 2nd number: 3 5/15
30/84 - 50/15 is -125/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
30/84 = 30 × 5/84 × 5 = 150/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
50/15 = 50 × 28/15 × 28 = 1400/420 - Subtract the two like fractions:
150/420 - 1400/420 = 150 - 1400/420 = -1250/420 - After reducing the fraction, the answer is -125/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/84-50/15 30/84-50/30 90/84-50/15 30/84-50/45 30/84-50/75