Subtract 81/42 from 1/10
1st number: 1/10, 2nd number: 1 39/42
1/10 - 81/42 is -64/35.
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,
1/10 = 1 × 21/10 × 21 = 21/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
81/42 = 81 × 5/42 × 5 = 405/210 - Subtract the two like fractions:
21/210 - 405/210 = 21 - 405/210 = -384/210 - After reducing the fraction, the answer is -64/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/10-81/42 1/20-81/42 1/10-81/84 3/10-81/42 1/30-81/42 5/10-81/42 1/50-81/42 7/10-81/42 1/70-81/42