Subtract 18/90 from 7/12
7/12 - 18/90 is 23/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
7/12 = 7 × 15/12 × 15 = 105/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
18/90 = 18 × 2/90 × 2 = 36/180 - Subtract the two like fractions:
105/180 - 36/180 = 105 - 36/180 = 69/180 - After reducing the fraction, the answer is 23/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/12-18/90 7/12-36/90 7/24-18/90 21/12-18/90 7/12-54/90 7/36-18/90 35/12-18/90 7/60-18/90 49/12-18/90 7/84-18/90