Subtract 18/24 from 15/84
15/84 - 18/24 is -4/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
15/84 = 15 × 2/84 × 2 = 30/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
18/24 = 18 × 7/24 × 7 = 126/168 - Subtract the two like fractions:
30/168 - 126/168 = 30 - 126/168 = -96/168 - After reducing the fraction, the answer is -4/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/84-18/24 15/84-36/24 15/84-18/48 45/84-18/24 15/84-54/24 15/84-18/72 75/84-18/24 15/84-90/24