Subtract 18/45 from 9/84
9/84 - 18/45 is -41/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
9/84 = 9 × 15/84 × 15 = 135/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
18/45 = 18 × 28/45 × 28 = 504/1260 - Subtract the two like fractions:
135/1260 - 504/1260 = 135 - 504/1260 = -369/1260 - After reducing the fraction, the answer is -41/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84-18/45 9/84-36/45 9/84-18/90 27/84-18/45 9/84-54/45 45/84-18/45 9/84-90/45 63/84-18/45