Subtract 5/8 from 30/42
30/42 - 5/8 is 5/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
30/42 = 30 × 4/42 × 4 = 120/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
5/8 = 5 × 21/8 × 21 = 105/168 - Subtract the two like fractions:
120/168 - 105/168 = 120 - 105/168 = 15/168 - After reducing the fraction, the answer is 5/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-5/8 30/42-10/8 30/84-5/8 30/42-5/16 90/42-5/8 30/42-15/8 30/42-5/24 30/42-25/8 30/42-5/40 30/42-35/8 30/42-5/56