Subtract 42/10 from 25/40
1st number: 25/40, 2nd number: 4 2/10
25/40 - 42/10 is -143/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
25/40 = 25 × 1/40 × 1 = 25/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
42/10 = 42 × 4/10 × 4 = 168/40 - Subtract the two like fractions:
25/40 - 168/40 = 25 - 168/40 = -143/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/40-42/10 25/40-84/10 25/80-42/10 25/40-42/20 75/40-42/10 25/40-42/30 25/40-42/50 25/40-42/70