Subtract 27/90 from 18/30
18/30 - 27/90 is 3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
18/30 = 18 × 3/30 × 3 = 54/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
27/90 = 27 × 1/90 × 1 = 27/90 - Subtract the two like fractions:
54/90 - 27/90 = 54 - 27/90 = 27/90 - After reducing the fraction, the answer is 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30-27/90 18/30-54/90 18/60-27/90 54/30-27/90 18/30-81/90 18/90-27/90 90/30-27/90