Subtract 9/42 from 1/10
1/10 - 9/42 is -4/35.
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,
9/42 = 9 × 5/42 × 5 = 45/210 - Subtract the two like fractions:
21/210 - 45/210 = 21 - 45/210 = -24/210 - After reducing the fraction, the answer is -4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/10-9/42 1/10-18/42 1/20-9/42 1/10-9/84 3/10-9/42 1/10-27/42 1/30-9/42 5/10-9/42 1/10-45/42 1/50-9/42 7/10-9/42 1/10-63/42 1/70-9/42