Subtract 18/10 from 42/24
1st number: 1 18/24, 2nd number: 1 8/10
42/24 - 18/10 is -1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 10 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 10 × 12 = 120,
18/10 = 18 × 12/10 × 12 = 216/120 - Subtract the two like fractions:
210/120 - 216/120 = 210 - 216/120 = -6/120 - After reducing the fraction, the answer is -1/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/24-18/10 42/24-36/10 42/48-18/10 42/24-18/20 42/24-54/10 42/72-18/10 42/24-18/30 42/24-90/10 42/24-18/50 42/24-18/70