Subtract 21/10 from 30/54
1st number: 30/54, 2nd number: 2 1/10
30/54 - 21/10 is -139/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 10 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
30/54 = 30 × 5/54 × 5 = 150/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
21/10 = 21 × 27/10 × 27 = 567/270 - Subtract the two like fractions:
150/270 - 567/270 = 150 - 567/270 = -417/270 - After reducing the fraction, the answer is -139/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/54-21/10 30/54-42/10 30/54-21/20 90/54-21/10 30/54-63/10 30/54-21/30 30/54-21/50 30/54-21/70