Subtract 9/45 from 12/84
12/84 - 9/45 is -2/35.
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,
12/84 = 12 × 15/84 × 15 = 180/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
9/45 = 9 × 28/45 × 28 = 252/1260 - Subtract the two like fractions:
180/1260 - 252/1260 = 180 - 252/1260 = -72/1260 - After reducing the fraction, the answer is -2/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84-9/45 12/84-18/45 12/84-9/90 36/84-9/45 12/84-27/45 60/84-9/45 12/84-63/45