Subtract 18/10 from 20/27
1st number: 20/27, 2nd number: 1 8/10
20/27 - 18/10 is -143/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 10 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
20/27 = 20 × 10/27 × 10 = 200/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
18/10 = 18 × 27/10 × 27 = 486/270 - Subtract the two like fractions:
200/270 - 486/270 = 200 - 486/270 = -286/270 - After reducing the fraction, the answer is -143/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27-18/10 20/27-36/10 20/54-18/10 20/27-18/20 60/27-18/10 20/27-54/10 20/81-18/10 20/27-18/30 20/27-90/10 20/27-18/50 20/27-18/70