Subtract 21/27 from 36/40
36/40 - 21/27 is 11/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
36/40 = 36 × 27/40 × 27 = 972/1080 - Likewise, for the 2nd fraction, since 27 × 40 = 1080,
21/27 = 21 × 40/27 × 40 = 840/1080 - Subtract the two like fractions:
972/1080 - 840/1080 = 972 - 840/1080 = 132/1080 - After reducing the fraction, the answer is 11/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40-21/27 36/40-42/27 36/80-21/27 36/40-21/54 36/40-63/27 36/40-21/81