Subtract 18/28 from 12/45
12/45 - 18/28 is -79/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 45 × 28 = 1260,
12/45 = 12 × 28/45 × 28 = 336/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
18/28 = 18 × 45/28 × 45 = 810/1260 - Subtract the two like fractions:
336/1260 - 810/1260 = 336 - 810/1260 = -474/1260 - After reducing the fraction, the answer is -79/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45-18/28 12/45-36/28 12/90-18/28 12/45-18/56 36/45-18/28 12/45-54/28 12/45-18/84 60/45-18/28 12/45-90/28 84/45-18/28