Subtract 30/24 from 42/30
1st number: 1 12/30, 2nd number: 1 6/24
42/30 - 30/24 is 3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
42/30 = 42 × 4/30 × 4 = 168/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
30/24 = 30 × 5/24 × 5 = 150/120 - Subtract the two like fractions:
168/120 - 150/120 = 168 - 150/120 = 18/120 - After reducing the fraction, the answer is 3/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-30/24 42/30-60/24 42/60-30/24 42/30-30/48 42/30-90/24 42/90-30/24 42/30-30/72