Subtract 9/80 from 21/10
1st number: 2 1/10, 2nd number: 9/80
2110 - 980 is 15980.
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,
2110 = 21 × 810 × 8 = 16880 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
980 = 9 × 180 × 1 = 980 - Subtract the two like fractions:
16880 - 980 = 168 - 980 = 15980 - In mixed form: 17980
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-9/80 21/10-18/80 21/20-9/80 63/10-9/80 21/10-27/80 21/30-9/80 21/10-45/80 21/50-9/80 21/10-63/80 21/70-9/80