Subtract 42/25 from 5/20
1st number: 5/20, 2nd number: 1 17/25
5/20 - 42/25 is -143/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
5/20 = 5 × 5/20 × 5 = 25/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
42/25 = 42 × 4/25 × 4 = 168/100 - Subtract the two like fractions:
25/100 - 168/100 = 25 - 168/100 = -143/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20-42/25 5/20-84/25 5/40-42/25 5/20-42/50 15/20-42/25 5/60-42/25 5/20-42/75 25/20-42/25 35/20-42/25