Subtract 45/90 from 90/7
1st number: 12 6/7, 2nd number: 45/90
90/7 - 45/90 is 173/14.
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,
90/7 = 90 × 90/7 × 90 = 8100/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
45/90 = 45 × 7/90 × 7 = 315/630 - Subtract the two like fractions:
8100/630 - 315/630 = 8100 - 315/630 = 7785/630 - After reducing the fraction, the answer is 173/14
- In mixed form: 125/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/14-45/90 90/21-45/90 90/35-45/90 90/49-45/90