Subtract 7/45 from 27/30
27/30 - 7/45 is 67/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
27/30 = 27 × 3/30 × 3 = 81/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
7/45 = 7 × 2/45 × 2 = 14/90 - Subtract the two like fractions:
81/90 - 14/90 = 81 - 14/90 = 67/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30-7/45 27/30-14/45 27/60-7/45 27/30-7/90 81/30-7/45 27/30-21/45 27/90-7/45 27/30-35/45 27/30-49/45