Subtract 21/27 from 20/50
20/50 - 21/27 is -17/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 27 is 1350
Next, find the equivalent fraction of both fractional numbers with denominator 1350 - For the 1st fraction, since 50 × 27 = 1350,
20/50 = 20 × 27/50 × 27 = 540/1350 - Likewise, for the 2nd fraction, since 27 × 50 = 1350,
21/27 = 21 × 50/27 × 50 = 1050/1350 - Subtract the two like fractions:
540/1350 - 1050/1350 = 540 - 1050/1350 = -510/1350 - After reducing the fraction, the answer is -17/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/50-21/27 20/50-42/27 20/50-21/54 60/50-21/27 20/50-63/27 20/50-21/81