Subtract 21/10 from 54/30
1st number: 1 24/30, 2nd number: 2 1/10
54/30 - 21/10 is -3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
54/30 = 54 × 1/30 × 1 = 54/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
21/10 = 21 × 3/10 × 3 = 63/30 - Subtract the two like fractions:
54/30 - 63/30 = 54 - 63/30 = -9/30 - After reducing the fraction, the answer is -3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30-42/10 54/60-21/10 54/30-21/20 54/30-63/10 54/90-21/10 54/30-21/30 54/30-21/50 54/30-21/70