Subtract 21/54 from 42/10
1st number: 4 2/10, 2nd number: 21/54
42/10 - 21/54 is 343/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 10 × 27 = 270,
42/10 = 42 × 27/10 × 27 = 1134/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Subtract the two like fractions:
1134/270 - 105/270 = 1134 - 105/270 = 1029/270 - After reducing the fraction, the answer is 343/90
- In mixed form: 373/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-21/54 42/10-42/54 42/20-21/54 42/10-63/54 42/30-21/54 42/50-21/54 42/70-21/54