Subtract 90/45 from 9/28
1st number: 9/28, 2nd number: 2 0/45
9/28 - 90/45 is -47/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
9/28 = 9 × 45/28 × 45 = 405/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
90/45 = 90 × 28/45 × 28 = 2520/1260 - Subtract the two like fractions:
405/1260 - 2520/1260 = 405 - 2520/1260 = -2115/1260 - After reducing the fraction, the answer is -47/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28-90/45 9/56-90/45 27/28-90/45 9/84-90/45 45/28-90/45 63/28-90/45