Subtract 81/24 from 8/5
1st number: 1 3/5, 2nd number: 3 9/24
8/5 - 81/24 is -71/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 5 × 24 = 120,
8/5 = 8 × 24/5 × 24 = 192/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
81/24 = 81 × 5/24 × 5 = 405/120 - Subtract the two like fractions:
192/120 - 405/120 = 192 - 405/120 = -213/120 - After reducing the fraction, the answer is -71/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5-81/24 8/10-81/24 8/5-81/48 24/5-81/24 8/15-81/24 8/5-81/72 40/5-81/24 8/25-81/24 56/5-81/24 8/35-81/24