Subtract 80/18 from 42/4
1st number: 10 2/4, 2nd number: 4 8/18
42/4 - 80/18 is 109/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
42/4 = 42 × 9/4 × 9 = 378/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
80/18 = 80 × 2/18 × 2 = 160/36 - Subtract the two like fractions:
378/36 - 160/36 = 378 - 160/36 = 218/36 - After reducing the fraction, the answer is 109/18
- In mixed form: 61/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-80/18 42/8-80/18 42/4-80/36 42/12-80/18 42/4-80/54 42/20-80/18 42/4-80/90 42/28-80/18