Subtract 8/90 from 28/7
1st number: 4 0/7, 2nd number: 8/90
28/7 - 8/90 is 176/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
28/7 = 28 × 90/7 × 90 = 2520/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
8/90 = 8 × 7/90 × 7 = 56/630 - Subtract the two like fractions:
2520/630 - 56/630 = 2520 - 56/630 = 2464/630 - After reducing the fraction, the answer is 176/45
- In mixed form: 341/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-8/90 28/7-16/90 28/14-8/90 84/7-8/90 28/7-24/90 28/21-8/90 28/7-40/90 28/35-8/90 28/7-56/90 28/49-8/90