Subtract 42/54 from 20/5
1st number: 4 0/5, 2nd number: 42/54
20/5 - 42/54 is 29/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 5 × 54 = 270,
20/5 = 20 × 54/5 × 54 = 1080/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
42/54 = 42 × 5/54 × 5 = 210/270 - Subtract the two like fractions:
1080/270 - 210/270 = 1080 - 210/270 = 870/270 - After reducing the fraction, the answer is 29/9
- In mixed form: 32/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5-42/54 20/5-84/54 20/10-42/54 60/5-42/54 20/15-42/54 20/25-42/54 20/35-42/54