Subtract 12/45 from 18/84
18/84 - 12/45 is -11/210.
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,
18/84 = 18 × 15/84 × 15 = 270/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
12/45 = 12 × 28/45 × 28 = 336/1260 - Subtract the two like fractions:
270/1260 - 336/1260 = 270 - 336/1260 = -66/1260 - After reducing the fraction, the answer is -11/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/84-12/45 18/84-24/45 18/84-12/90 54/84-12/45 18/84-36/45 90/84-12/45 18/84-60/45 18/84-84/45