Subtract 21/80 from 27/10
1st number: 2 7/10, 2nd number: 21/80
27/10 - 21/80 is 39/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
27/10 = 27 × 8/10 × 8 = 216/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Subtract the two like fractions:
216/80 - 21/80 = 216 - 21/80 = 195/80 - After reducing the fraction, the answer is 39/16
- In mixed form: 27/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/10-21/80 27/10-42/80 27/20-21/80 81/10-21/80 27/10-63/80 27/30-21/80 27/50-21/80 27/70-21/80