Subtract 18/50 from 3/42
3/42 - 18/50 is -101/350.
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,
3/42 = 3 × 25/42 × 25 = 75/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
18/50 = 18 × 21/50 × 21 = 378/1050 - Subtract the two like fractions:
75/1050 - 378/1050 = 75 - 378/1050 = -303/1050 - After reducing the fraction, the answer is -101/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42-18/50 3/42-36/50 3/84-18/50 9/42-18/50 3/42-54/50 15/42-18/50 3/42-90/50 21/42-18/50