Subtract 32/45 from 42/20
1st number: 2 2/20, 2nd number: 32/45
42/20 - 32/45 is 25/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
32/45 = 32 × 4/45 × 4 = 128/180 - Subtract the two like fractions:
378/180 - 128/180 = 378 - 128/180 = 250/180 - After reducing the fraction, the answer is 25/18
- In mixed form: 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-32/45 42/20-64/45 42/40-32/45 42/20-32/90 42/20-96/45 42/60-32/45