Subtract 42/24 from 1/20
1st number: 1/20, 2nd number: 1 18/24
1/20 - 42/24 is -17/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
1/20 = 1 × 6/20 × 6 = 6/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
42/24 = 42 × 5/24 × 5 = 210/120 - Subtract the two like fractions:
6/120 - 210/120 = 6 - 210/120 = -204/120 - After reducing the fraction, the answer is -17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20-42/24 1/20-84/24 1/40-42/24 1/20-42/48 3/20-42/24 1/60-42/24 1/20-42/72 5/20-42/24 7/20-42/24