Subtract 12/42 from 18/5
1st number: 3 3/5, 2nd number: 12/42
18/5 - 12/42 is 116/35.
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,
18/5 = 18 × 42/5 × 42 = 756/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
12/42 = 12 × 5/42 × 5 = 60/210 - Subtract the two like fractions:
756/210 - 60/210 = 756 - 60/210 = 696/210 - After reducing the fraction, the answer is 116/35
- In mixed form: 311/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5-12/42 18/5-24/42 18/10-12/42 18/5-12/84 54/5-12/42 18/5-36/42 18/15-12/42 90/5-12/42 18/5-60/42 18/25-12/42 18/5-84/42 18/35-12/42