Subtract 28/45 from 7/49
7/49 - 28/45 is -151/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 45 is 2205
Next, find the equivalent fraction of both fractional numbers with denominator 2205 - For the 1st fraction, since 49 × 45 = 2205,
7/49 = 7 × 45/49 × 45 = 315/2205 - Likewise, for the 2nd fraction, since 45 × 49 = 2205,
28/45 = 28 × 49/45 × 49 = 1372/2205 - Subtract the two like fractions:
315/2205 - 1372/2205 = 315 - 1372/2205 = -1057/2205 - After reducing the fraction, the answer is -151/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/49-28/45 7/49-56/45 7/98-28/45 7/49-28/90 21/49-28/45 7/49-84/45 35/49-28/45