Subtract 56/42 from 81/30
1st number: 2 21/30, 2nd number: 1 14/42
81/30 - 56/42 is 41/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
56/42 = 56 × 5/42 × 5 = 280/210 - Subtract the two like fractions:
567/210 - 280/210 = 567 - 280/210 = 287/210 - 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: 81/60-56/42 81/30-56/84 81/90-56/42