Subtract 27/80 from 18/30
18/30 - 27/80 is 21/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
18/30 = 18 × 8/30 × 8 = 144/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
27/80 = 27 × 3/80 × 3 = 81/240 - Subtract the two like fractions:
144/240 - 81/240 = 144 - 81/240 = 63/240 - After reducing the fraction, the answer is 21/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30-27/80 18/30-54/80 18/60-27/80 54/30-27/80 18/30-81/80 18/90-27/80 90/30-27/80