Subtract 18/24 from 90/20
1st number: 4 10/20, 2nd number: 18/24
90/20 - 18/24 is 15/4.
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,
90/20 = 90 × 6/20 × 6 = 540/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
18/24 = 18 × 5/24 × 5 = 90/120 - Subtract the two like fractions:
540/120 - 90/120 = 540 - 90/120 = 450/120 - After reducing the fraction, the answer is 15/4
- In mixed form: 33/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-36/24 90/40-18/24 90/20-18/48 90/20-54/24 90/60-18/24 90/20-18/72 90/20-90/24