Subtract 18/90 from 10/7
1st number: 1 3/7, 2nd number: 18/90
10/7 - 18/90 is 43/35.
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,
10/7 = 10 × 90/7 × 90 = 900/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
18/90 = 18 × 7/90 × 7 = 126/630 - Subtract the two like fractions:
900/630 - 126/630 = 900 - 126/630 = 774/630 - After reducing the fraction, the answer is 43/35
- In mixed form: 18/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/7-18/90 10/7-36/90 10/14-18/90 30/7-18/90 10/7-54/90 10/21-18/90 50/7-18/90 10/35-18/90 70/7-18/90 10/49-18/90