Subtract 54/21 from 5/30
1st number: 5/30, 2nd number: 2 12/21
5/30 - 54/21 is -101/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
54/21 = 54 × 10/21 × 10 = 540/210 - Subtract the two like fractions:
35/210 - 540/210 = 35 - 540/210 = -505/210 - After reducing the fraction, the answer is -101/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/30-54/21 5/60-54/21 5/30-54/42 15/30-54/21 5/90-54/21 5/30-54/63 25/30-54/21 35/30-54/21