Subtract 90/12 from 1/90
1st number: 1/90, 2nd number: 7 6/12
1/90 - 90/12 is -337/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
1/90 = 1 × 2/90 × 2 = 2/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
90/12 = 90 × 15/12 × 15 = 1350/180 - Subtract the two like fractions:
2/180 - 1350/180 = 2 - 1350/180 = -1348/180 - After reducing the fraction, the answer is -337/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90-90/12 1/90-90/24 3/90-90/12 1/90-90/36 5/90-90/12 1/90-90/60 7/90-90/12 1/90-90/84