Subtract 18/45 from 42/9
1st number: 4 6/9, 2nd number: 18/45
42/9 - 18/45 is 64/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
42/9 = 42 × 5/9 × 5 = 210/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
18/45 = 18 × 1/45 × 1 = 18/45 - Subtract the two like fractions:
210/45 - 18/45 = 210 - 18/45 = 192/45 - After reducing the fraction, the answer is 64/15
- In mixed form: 44/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-18/45 42/9-36/45 42/18-18/45 42/9-18/90 42/9-54/45 42/27-18/45 42/9-90/45 42/45-18/45 42/63-18/45