Subtract 15/42 from 4/10
4/10 - 15/42 is 3/70.
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,
4/10 = 4 × 21/10 × 21 = 84/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Subtract the two like fractions:
84/210 - 75/210 = 84 - 75/210 = 9/210 - After reducing the fraction, the answer is 3/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10-15/42 4/10-30/42 4/20-15/42 4/10-15/84 12/10-15/42 4/10-45/42 4/30-15/42 20/10-15/42 4/10-75/42 4/50-15/42 28/10-15/42 4/70-15/42