Subtract 28/20 from 42/25
1st number: 1 17/25, 2nd number: 1 8/20
42/25 - 28/20 is 7/25.
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,
28/20 = 28 × 5/20 × 5 = 140/100 - Subtract the two like fractions:
168/100 - 140/100 = 168 - 140/100 = 28/100 - After reducing the fraction, the answer is 7/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/25-28/20 42/25-56/20 42/50-28/20 42/25-28/40 42/25-84/20 42/75-28/20 42/25-28/60