Subtract 3/24 from 21/20
1st number: 1 1/20, 2nd number: 3/24
21/20 - 3/24 is 37/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
21/20 = 21 × 6/20 × 6 = 126/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
3/24 = 3 × 5/24 × 5 = 15/120 - Subtract the two like fractions:
126/120 - 15/120 = 126 - 15/120 = 111/120 - After reducing the fraction, the answer is 37/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-3/24 21/20-6/24 21/40-3/24 21/20-3/48 63/20-3/24 21/20-9/24 21/60-3/24 21/20-3/72 21/20-15/24 21/20-21/24