Subtract 1/42 from 3/10
3/10 - 1/42 is 29/105.
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,
3/10 = 3 × 21/10 × 21 = 63/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
1/42 = 1 × 5/42 × 5 = 5/210 - Subtract the two like fractions:
63/210 - 5/210 = 63 - 5/210 = 58/210 - After reducing the fraction, the answer is 29/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/10-1/42 3/10-2/42 3/20-1/42 3/10-1/84 9/10-1/42 3/10-3/42 3/30-1/42 15/10-1/42 3/10-5/42 3/50-1/42 21/10-1/42 3/10-7/42 3/70-1/42