Subtract 90/24 from 15/40
1st number: 15/40, 2nd number: 3 18/24
15/40 - 90/24 is -27/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
15/40 = 15 × 3/40 × 3 = 45/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
90/24 = 90 × 5/24 × 5 = 450/120 - Subtract the two like fractions:
45/120 - 450/120 = 45 - 450/120 = -405/120 - After reducing the fraction, the answer is -27/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40-90/24 15/80-90/24 15/40-90/48 45/40-90/24 15/40-90/72 75/40-90/24