Subtract 2/21 from 27/60
27/60 - 2/21 is 149/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
27/60 = 27 × 7/60 × 7 = 189/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
2/21 = 2 × 20/21 × 20 = 40/420 - Subtract the two like fractions:
189/420 - 40/420 = 189 - 40/420 = 149/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/60-2/21 27/60-4/21 27/60-2/42 81/60-2/21 27/60-6/21 27/60-2/63 27/60-10/21 27/60-14/21