Subtract 28/50 from 15/42
15/42 - 28/50 is -71/350.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
15/42 = 15 × 25/42 × 25 = 375/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
28/50 = 28 × 21/50 × 21 = 588/1050 - Subtract the two like fractions:
375/1050 - 588/1050 = 375 - 588/1050 = -213/1050 - After reducing the fraction, the answer is -71/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42-28/50 15/42-56/50 15/84-28/50 45/42-28/50 15/42-84/50 75/42-28/50