Subtract 54/30 from 21/35
1st number: 21/35, 2nd number: 1 24/30
21/35 - 54/30 is -6/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
21/35 = 21 × 6/35 × 6 = 126/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
54/30 = 54 × 7/30 × 7 = 378/210 - Subtract the two like fractions:
126/210 - 378/210 = 126 - 378/210 = -252/210 - After reducing the fraction, the answer is -6/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35-54/30 21/70-54/30 21/35-54/60 63/35-54/30 21/35-54/90