Subtract 7/42 from 81/10
1st number: 8 1/10, 2nd number: 7/42
81/10 - 7/42 is 119/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
81/10 = 81 × 21/10 × 21 = 1701/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Subtract the two like fractions:
1701/210 - 35/210 = 1701 - 35/210 = 1666/210 - After reducing the fraction, the answer is 119/15
- In mixed form: 714/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/10-14/42 81/20-7/42 81/10-7/84 81/10-21/42 81/30-7/42 81/10-35/42 81/50-7/42 81/10-49/42 81/70-7/42