Subtract 42/48 from 30/50
30/50 - 42/48 is -11/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 48 is 1200
Next, find the equivalent fraction of both fractional numbers with denominator 1200 - For the 1st fraction, since 50 × 24 = 1200,
30/50 = 30 × 24/50 × 24 = 720/1200 - Likewise, for the 2nd fraction, since 48 × 25 = 1200,
42/48 = 42 × 25/48 × 25 = 1050/1200 - Subtract the two like fractions:
720/1200 - 1050/1200 = 720 - 1050/1200 = -330/1200 - After reducing the fraction, the answer is -11/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/50-42/48 30/50-84/48 30/50-42/96 90/50-42/48