Subtract 18/42 from 12/10
1st number: 1 2/10, 2nd number: 18/42
12/10 - 18/42 is 27/35.
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,
12/10 = 12 × 21/10 × 21 = 252/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
18/42 = 18 × 5/42 × 5 = 90/210 - Subtract the two like fractions:
252/210 - 90/210 = 252 - 90/210 = 162/210 - After reducing the fraction, the answer is 27/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/10-18/42 12/10-36/42 12/20-18/42 12/10-18/84 36/10-18/42 12/10-54/42 12/30-18/42 60/10-18/42 12/10-90/42 12/50-18/42 84/10-18/42 12/70-18/42