Subtract 42/50 from 3/7
3/7 - 42/50 is -72/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 50 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 7 × 50 = 350,
3/7 = 3 × 50/7 × 50 = 150/350 - Likewise, for the 2nd fraction, since 50 × 7 = 350,
42/50 = 42 × 7/50 × 7 = 294/350 - Subtract the two like fractions:
150/350 - 294/350 = 150 - 294/350 = -144/350 - After reducing the fraction, the answer is -72/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-42/50 3/7-84/50 3/14-42/50 9/7-42/50 3/21-42/50 15/7-42/50 3/35-42/50 21/7-42/50 3/49-42/50