Subtract 21/40 from 30/24
1st number: 1 6/24, 2nd number: 21/40
30/24 - 21/40 is 29/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
30/24 = 30 × 5/24 × 5 = 150/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Subtract the two like fractions:
150/120 - 63/120 = 150 - 63/120 = 87/120 - After reducing the fraction, the answer is 29/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/24-21/40 30/24-42/40 30/48-21/40 30/24-21/80 90/24-21/40 30/24-63/40 30/72-21/40