Subtract 18/54 from 42/20
1st number: 2 2/20, 2nd number: 18/54
42/20 - 18/54 is 53/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 54 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
42/20 = 42 × 27/20 × 27 = 1134/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
18/54 = 18 × 10/54 × 10 = 180/540 - Subtract the two like fractions:
1134/540 - 180/540 = 1134 - 180/540 = 954/540 - After reducing the fraction, the answer is 53/30
- In mixed form: 123/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-18/54 42/20-36/54 42/40-18/54 42/60-18/54 42/20-90/54