Subtract 90/28 from 12/45
1st number: 12/45, 2nd number: 3 6/28
12/45 - 90/28 is -619/210.
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,
90/28 = 90 × 45/28 × 45 = 4050/1260 - Subtract the two like fractions:
336/1260 - 4050/1260 = 336 - 4050/1260 = -3714/1260 - After reducing the fraction, the answer is -619/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45-90/28 12/90-90/28 12/45-90/56 36/45-90/28 12/45-90/84 60/45-90/28 84/45-90/28