Subtract 90/5 from 27/15
1st number: 1 12/15, 2nd number: 18 0/5
27/15 - 90/5 is -81/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 5 is 15
Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 15 × 1 = 15,
27/15 = 27 × 1/15 × 1 = 27/15 - Likewise, for the 2nd fraction, since 5 × 3 = 15,
90/5 = 90 × 3/5 × 3 = 270/15 - Subtract the two like fractions:
27/15 - 270/15 = 27 - 270/15 = -243/15 - After reducing the fraction, the answer is -81/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15-90/5 27/30-90/5 27/15-90/10 81/15-90/5 27/45-90/5 27/15-90/15 27/75-90/5 27/15-90/25 27/15-90/35