Subtract 25/42 from 1/5
1/5 - 25/42 is -83/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
1/5 = 1 × 42/5 × 42 = 42/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
25/42 = 25 × 5/42 × 5 = 125/210 - Subtract the two like fractions:
42/210 - 125/210 = 42 - 125/210 = -83/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5-25/42 1/5-50/42 1/10-25/42 1/5-25/84 3/5-25/42 1/5-75/42 1/15-25/42 1/25-25/42 7/5-25/42 1/35-25/42