Subtract 10/18 from 80/42
1st number: 1 38/42, 2nd number: 10/18
80/42 - 10/18 is 85/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
80/42 = 80 × 3/42 × 3 = 240/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
10/18 = 10 × 7/18 × 7 = 70/126 - Subtract the two like fractions:
240/126 - 70/126 = 240 - 70/126 = 170/126 - After reducing the fraction, the answer is 85/63
- In mixed form: 122/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42-20/18 80/84-10/18 80/42-10/36 80/42-30/18 80/42-10/54 80/42-50/18 80/42-10/90 80/42-70/18