Subtract 24/21 from 24/30
1st number: 24/30, 2nd number: 1 3/21
24/30 - 24/21 is -12/35.
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,
24/30 = 24 × 7/30 × 7 = 168/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
24/21 = 24 × 10/21 × 10 = 240/210 - Subtract the two like fractions:
168/210 - 240/210 = 168 - 240/210 = -72/210 - After reducing the fraction, the answer is -12/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/30-24/21 24/30-48/21 24/60-24/21 24/30-24/42 72/30-24/21 24/30-72/21 24/90-24/21 24/30-24/63