Subtract 28/14 from 7/90
1st number: 7/90, 2nd number: 2 0/14
7/90 - 28/14 is -173/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 14 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
7/90 = 7 × 7/90 × 7 = 49/630 - Likewise, for the 2nd fraction, since 14 × 45 = 630,
28/14 = 28 × 45/14 × 45 = 1260/630 - Subtract the two like fractions:
49/630 - 1260/630 = 49 - 1260/630 = -1211/630 - After reducing the fraction, the answer is -173/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-28/14 7/90-56/14 21/90-28/14 7/90-84/14 7/90-28/42 35/90-28/14 7/90-28/70 49/90-28/14 7/90-28/98