Subtract 9/90 from 28/7
1st number: 4 0/7, 2nd number: 9/90
28/7 - 9/90 is 39/10.
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,
9/90 = 9 × 7/90 × 7 = 63/630 - Subtract the two like fractions:
2520/630 - 63/630 = 2520 - 63/630 = 2457/630 - After reducing the fraction, the answer is 39/10
- In mixed form: 39/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-9/90 28/7-18/90 28/14-9/90 84/7-9/90 28/7-27/90 28/21-9/90 28/7-45/90 28/35-9/90 28/7-63/90 28/49-9/90