Subtract 30/50 from 3/42
3/42 - 30/50 is -37/70.
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,
30/50 = 30 × 21/50 × 21 = 630/1050 - Subtract the two like fractions:
75/1050 - 630/1050 = 75 - 630/1050 = -555/1050 - After reducing the fraction, the answer is -37/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42-30/50 3/42-60/50 3/84-30/50 9/42-30/50 3/42-90/50 15/42-30/50 21/42-30/50