Subtract 2/40 from 27/30
27/30 - 2/40 is 17/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 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 40 × 3 = 120,
2/40 = 2 × 3/40 × 3 = 6/120 - Subtract the two like fractions:
108/120 - 6/120 = 108 - 6/120 = 102/120 - After reducing the fraction, the answer is 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30-2/40 27/30-4/40 27/60-2/40 27/30-2/80 81/30-2/40 27/30-6/40 27/90-2/40 27/30-10/40 27/30-14/40