Subtract 24/18 from 81/30
1st number: 2 21/30, 2nd number: 1 6/18
81/30 - 24/18 is 41/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
81/30 = 81 × 3/30 × 3 = 243/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
24/18 = 24 × 5/18 × 5 = 120/90 - Subtract the two like fractions:
243/90 - 120/90 = 243 - 120/90 = 123/90 - After reducing the fraction, the answer is 41/30
- In mixed form: 111/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30-48/18 81/60-24/18 81/30-24/36 81/30-72/18 81/90-24/18 81/30-24/54 81/30-24/90