Subtract 15/42 from 3/5
3/5 - 15/42 is 17/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
3/5 = 3 × 42/5 × 42 = 126/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Subtract the two like fractions:
126/210 - 75/210 = 126 - 75/210 = 51/210 - After reducing the fraction, the answer is 17/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/5-15/42 3/5-30/42 3/10-15/42 3/5-15/84 9/5-15/42 3/5-45/42 3/15-15/42 15/5-15/42 3/5-75/42 3/25-15/42 21/5-15/42 3/35-15/42