Subtract 15/20 from 42/25
1st number: 1 17/25, 2nd number: 15/20
42/25 - 15/20 is 93/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 20 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 25 × 4 = 100,
42/25 = 42 × 4/25 × 4 = 168/100 - Likewise, for the 2nd fraction, since 20 × 5 = 100,
15/20 = 15 × 5/20 × 5 = 75/100 - Subtract the two like fractions:
168/100 - 75/100 = 168 - 75/100 = 93/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/25-15/20 42/25-30/20 42/50-15/20 42/25-15/40 42/25-45/20 42/75-15/20 42/25-15/60 42/25-75/20