Subtract 6/40 from 21/27
21/27 - 6/40 is 113/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 40 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 27 × 40 = 1080,
21/27 = 21 × 40/27 × 40 = 840/1080 - Likewise, for the 2nd fraction, since 40 × 27 = 1080,
6/40 = 6 × 27/40 × 27 = 162/1080 - Subtract the two like fractions:
840/1080 - 162/1080 = 840 - 162/1080 = 678/1080 - After reducing the fraction, the answer is 113/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27-6/40 21/27-12/40 21/54-6/40 21/27-6/80 63/27-6/40 21/27-18/40 21/81-6/40 21/27-30/40 21/27-42/40