Subtract 1/5 from 42/24
1st number: 1 18/24, 2nd number: 1/5
42/24 - 1/5 is 31/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 5 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
42/24 = 42 × 5/24 × 5 = 210/120 - Likewise, for the 2nd fraction, since 5 × 24 = 120,
1/5 = 1 × 24/5 × 24 = 24/120 - Subtract the two like fractions:
210/120 - 24/120 = 210 - 24/120 = 186/120 - After reducing the fraction, the answer is 31/20
- In mixed form: 111/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/24-1/5 42/24-2/5 42/48-1/5 42/24-1/10 42/24-3/5 42/72-1/5 42/24-1/15 42/24-1/25 42/24-7/5 42/24-1/35