Subtract 18/42 from 3/5
3/5 - 18/42 is 6/35.
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,
18/42 = 18 × 5/42 × 5 = 90/210 - Subtract the two like fractions:
126/210 - 90/210 = 126 - 90/210 = 36/210 - After reducing the fraction, the answer is 6/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/5-18/42 3/5-36/42 3/10-18/42 3/5-18/84 9/5-18/42 3/5-54/42 3/15-18/42 15/5-18/42 3/5-90/42 3/25-18/42 21/5-18/42 3/35-18/42