Subtract 90/9 from 18/16
1st number: 1 2/16, 2nd number: 10 0/9
18/16 - 90/9 is -71/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 9 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 16 × 9 = 144,
18/16 = 18 × 9/16 × 9 = 162/144 - Likewise, for the 2nd fraction, since 9 × 16 = 144,
90/9 = 90 × 16/9 × 16 = 1440/144 - Subtract the two like fractions:
162/144 - 1440/144 = 162 - 1440/144 = -1278/144 - After reducing the fraction, the answer is -71/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/16-90/9 18/32-90/9 18/16-90/18 54/16-90/9 18/48-90/9 18/16-90/27 90/16-90/9 18/80-90/9 18/16-90/45 18/16-90/63