Subtract 3/8 from 25/42
25/42 - 3/8 is 37/168.
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,
3/8 = 3 × 21/8 × 21 = 63/168 - Subtract the two like fractions:
100/168 - 63/168 = 100 - 63/168 = 37/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-3/8 25/42-6/8 25/84-3/8 25/42-3/16 75/42-3/8 25/42-9/8 25/42-3/24 25/42-15/8 25/42-3/40 25/42-21/8 25/42-3/56