Subtract 3/8 from 27/30
27/30 - 3/8 is 21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
27/30 = 27 × 4/30 × 4 = 108/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
3/8 = 3 × 15/8 × 15 = 45/120 - Subtract the two like fractions:
108/120 - 45/120 = 108 - 45/120 = 63/120 - After reducing the fraction, the answer is 21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30-3/8 27/30-6/8 27/60-3/8 27/30-3/16 81/30-3/8 27/30-9/8 27/90-3/8 27/30-3/24 27/30-15/8 27/30-3/40 27/30-21/8 27/30-3/56