Subtract 2/10 from 4/42
4/42 - 2/10 is -11/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
4/42 = 4 × 5/42 × 5 = 20/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
2/10 = 2 × 21/10 × 21 = 42/210 - Subtract the two like fractions:
20/210 - 42/210 = 20 - 42/210 = -22/210 - After reducing the fraction, the answer is -11/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42-2/10 4/42-4/10 4/84-2/10 4/42-2/20 12/42-2/10 4/42-6/10 4/42-2/30 20/42-2/10 4/42-2/50 28/42-2/10 4/42-14/10 4/42-2/70