Subtract 7/30 from 42/50
42/50 - 7/30 is 91/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 50 × 3 = 150,
42/50 = 42 × 3/50 × 3 = 126/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
7/30 = 7 × 5/30 × 5 = 35/150 - Subtract the two like fractions:
126/150 - 35/150 = 126 - 35/150 = 91/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-7/30 42/50-14/30 42/50-7/60 42/50-21/30 42/50-7/90 42/50-35/30 42/50-49/30