Subtract 45/18 from 90/7
1st number: 12 6/7, 2nd number: 2 9/18
90/7 - 45/18 is 145/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
90/7 = 90 × 18/7 × 18 = 1620/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
45/18 = 45 × 7/18 × 7 = 315/126 - Subtract the two like fractions:
1620/126 - 315/126 = 1620 - 315/126 = 1305/126 - After reducing the fraction, the answer is 145/14
- In mixed form: 105/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-90/18 90/14-45/18 90/7-45/36 90/21-45/18 90/7-45/54 90/35-45/18 90/7-45/90 90/49-45/18