Subtract 30/12 from 27/90
1st number: 27/90, 2nd number: 2 6/12
27/90 - 30/12 is -11/5.
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,
27/90 = 27 × 2/90 × 2 = 54/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
30/12 = 30 × 15/12 × 15 = 450/180 - Subtract the two like fractions:
54/180 - 450/180 = 54 - 450/180 = -396/180 - After reducing the fraction, the answer is -11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90-30/12 27/90-60/12 27/90-30/24 81/90-30/12 27/90-90/12 27/90-30/36 27/90-30/60 27/90-30/84