Subtract 3/30 from 27/28
27/28 - 3/30 is 121/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
27/28 = 27 × 15/28 × 15 = 405/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
3/30 = 3 × 14/30 × 14 = 42/420 - Subtract the two like fractions:
405/420 - 42/420 = 405 - 42/420 = 363/420 - After reducing the fraction, the answer is 121/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/28-3/30 27/28-6/30 27/56-3/30 27/28-3/60 81/28-3/30 27/28-9/30 27/84-3/30 27/28-3/90 27/28-15/30 27/28-21/30