Subtract 42/24 from 30/40
1st number: 30/40, 2nd number: 1 18/24
30/40 - 42/24 is -1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
30/40 = 30 × 3/40 × 3 = 90/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
42/24 = 42 × 5/24 × 5 = 210/120 - Subtract the two like fractions:
90/120 - 210/120 = 90 - 210/120 = -120/120 - After reducing the fraction, the answer is -1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40-42/24 30/40-84/24 30/80-42/24 30/40-42/48 90/40-42/24 30/40-42/72