Subtract 28/7 from 2/90
1st number: 2/90, 2nd number: 4 0/7
2/90 - 28/7 is -179/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
2/90 = 2 × 7/90 × 7 = 14/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
28/7 = 28 × 90/7 × 90 = 2520/630 - Subtract the two like fractions:
14/630 - 2520/630 = 14 - 2520/630 = -2506/630 - After reducing the fraction, the answer is -179/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/90-28/7 2/90-56/7 2/90-28/14 6/90-28/7 2/90-84/7 2/90-28/21 10/90-28/7 2/90-28/35 14/90-28/7 2/90-28/49