Subtract 5/8 from 25/42
25/42 - 5/8 is -5/168.
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,
25/42 = 25 × 4/42 × 4 = 100/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
5/8 = 5 × 21/8 × 21 = 105/168 - Subtract the two like fractions:
100/168 - 105/168 = 100 - 105/168 = -5/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-5/8 25/42-10/8 25/84-5/8 25/42-5/16 75/42-5/8 25/42-15/8 25/42-5/24 25/42-25/8 25/42-5/40 25/42-35/8 25/42-5/56