Subtract 2/42 from 20/18
1st number: 1 2/18, 2nd number: 2/42
20/18 - 2/42 is 67/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
2/42 = 2 × 3/42 × 3 = 6/126 - Subtract the two like fractions:
140/126 - 6/126 = 140 - 6/126 = 134/126 - After reducing the fraction, the answer is 67/63
- In mixed form: 14/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18-2/42 20/18-4/42 20/36-2/42 20/18-2/84 60/18-2/42 20/18-6/42 20/54-2/42 20/18-10/42 20/90-2/42 20/18-14/42