Subtract 2/20 from 21/24
21/24 - 2/20 is 31/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 20 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120 - Likewise, for the 2nd fraction, since 20 × 6 = 120,
2/20 = 2 × 6/20 × 6 = 12/120 - Subtract the two like fractions:
105/120 - 12/120 = 105 - 12/120 = 93/120 - After reducing the fraction, the answer is 31/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-2/20 21/24-4/20 21/48-2/20 21/24-2/40 63/24-2/20 21/24-6/20 21/72-2/20 21/24-2/60 21/24-10/20 21/24-14/20